Index: lldb/trunk/include/lldb/Core/Timer.h
===================================================================
--- lldb/trunk/include/lldb/Core/Timer.h
+++ lldb/trunk/include/lldb/Core/Timer.h
@@ -37,10 +37,23 @@
 
 class Timer {
 public:
+  class Category {
+  public:
+    explicit Category(const char *category_name);
+
+  private:
+    friend class Timer;
+    const char *m_name;
+    std::atomic<uint64_t> m_nanos;
+    std::atomic<Category *> m_next;
+
+    DISALLOW_COPY_AND_ASSIGN(Category);
+  };
+
   //--------------------------------------------------------------
   /// Default constructor.
   //--------------------------------------------------------------
-  Timer(const char *category, const char *format, ...)
+  Timer(Category &category, const char *format, ...)
       __attribute__((format(printf, 3, 4)));
 
   //--------------------------------------------------------------
@@ -62,7 +75,7 @@
   using TimePoint = std::chrono::steady_clock::time_point;
   void ChildDuration(TimePoint::duration dur) { m_child_duration += dur; }
 
-  const char *m_category;
+  Category &m_category;
   TimePoint m_total_start;
   TimePoint::duration m_child_duration{0};
 
Index: lldb/trunk/source/API/SystemInitializerFull.cpp
===================================================================
--- lldb/trunk/source/API/SystemInitializerFull.cpp
+++ lldb/trunk/source/API/SystemInitializerFull.cpp
@@ -400,7 +400,8 @@
 }
 
 void SystemInitializerFull::Terminate() {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   Debugger::SettingsTerminate();
 
Index: lldb/trunk/source/Commands/CommandObjectTarget.cpp
===================================================================
--- lldb/trunk/source/Commands/CommandObjectTarget.cpp
+++ lldb/trunk/source/Commands/CommandObjectTarget.cpp
@@ -269,8 +269,8 @@
       }
 
       const char *file_path = command.GetArgumentAtIndex(0);
-      Timer scoped_timer(LLVM_PRETTY_FUNCTION, "(lldb) target create '%s'",
-                         file_path);
+      static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+      Timer scoped_timer(func_cat, "(lldb) target create '%s'", file_path);
       FileSpec file_spec;
 
       if (file_path)
Index: lldb/trunk/source/Core/Disassembler.cpp
===================================================================
--- lldb/trunk/source/Core/Disassembler.cpp
+++ lldb/trunk/source/Core/Disassembler.cpp
@@ -59,7 +59,8 @@
 DisassemblerSP Disassembler::FindPlugin(const ArchSpec &arch,
                                         const char *flavor,
                                         const char *plugin_name) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "Disassembler::FindPlugin (arch = %s, plugin_name = %s)",
                      arch.GetArchitectureName(), plugin_name);
 
@@ -1460,4 +1461,3 @@
 lldb_private::OperandMatchers::MatchOpType(Instruction::Operand::Type type) {
   return [type](const Instruction::Operand &op) { return op.m_type == type; };
 }
-
Index: lldb/trunk/source/Core/Mangled.cpp
===================================================================
--- lldb/trunk/source/Core/Mangled.cpp
+++ lldb/trunk/source/Core/Mangled.cpp
@@ -258,8 +258,8 @@
   // haven't already decoded our mangled name.
   if (m_mangled && !m_demangled) {
     // We need to generate and cache the demangled name.
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                       "Mangled::GetDemangledName (m_mangled = %s)",
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat, "Mangled::GetDemangledName (m_mangled = %s)",
                        m_mangled.GetCString());
 
     Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_DEMANGLE);
Index: lldb/trunk/source/Core/Module.cpp
===================================================================
--- lldb/trunk/source/Core/Module.cpp
+++ lldb/trunk/source/Core/Module.cpp
@@ -429,8 +429,8 @@
 
 size_t Module::GetNumCompileUnits() {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                     "Module::GetNumCompileUnits (module = %p)",
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "Module::GetNumCompileUnits (module = %p)",
                      static_cast<void *>(this));
   SymbolVendor *symbols = GetSymbolVendor();
   if (symbols)
@@ -453,7 +453,8 @@
 
 bool Module::ResolveFileAddress(lldb::addr_t vm_addr, Address &so_addr) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "Module::ResolveFileAddress (vm_addr = 0x%" PRIx64 ")",
                      vm_addr);
   SectionList *section_list = GetSectionList();
@@ -616,7 +617,8 @@
                                                   uint32_t resolve_scope,
                                                   SymbolContextList &sc_list) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "Module::ResolveSymbolContextForFilePath (%s:%u, "
                      "check_inlines = %s, resolve_scope = 0x%8.8x)",
                      file_spec.GetPath().c_str(), line,
@@ -987,7 +989,8 @@
     const CompilerDeclContext *parent_decl_ctx, bool append, size_t max_matches,
     llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
     TypeMap &types) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
   if (!sc.module_sp || sc.module_sp.get() == this) {
     SymbolVendor *symbols = GetSymbolVendor();
     if (symbols)
@@ -1078,7 +1081,8 @@
     if (!m_did_load_symbol_vendor.load() && can_create) {
       ObjectFile *obj_file = GetObjectFile();
       if (obj_file != nullptr) {
-        Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+        static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+        Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
         m_symfile_ap.reset(
             SymbolVendor::FindPlugin(shared_from_this(), feedback_strm));
         m_did_load_symbol_vendor = true;
@@ -1278,8 +1282,8 @@
   if (!m_did_load_objfile.load()) {
     std::lock_guard<std::recursive_mutex> guard(m_mutex);
     if (!m_did_load_objfile.load()) {
-      Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                         "Module::GetObjectFile () module = %s",
+      static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+      Timer scoped_timer(func_cat, "Module::GetObjectFile () module = %s",
                          GetFileSpec().GetFilename().AsCString(""));
       DataBufferSP data_sp;
       lldb::offset_t data_offset = 0;
@@ -1338,9 +1342,9 @@
 
 const Symbol *Module::FindFirstSymbolWithNameAndType(const ConstString &name,
                                                      SymbolType symbol_type) {
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
-      "Module::FindFirstSymbolWithNameAndType (name = %s, type = %i)",
+      func_cat, "Module::FindFirstSymbolWithNameAndType (name = %s, type = %i)",
       name.AsCString(), symbol_type);
   SymbolVendor *sym_vendor = GetSymbolVendor();
   if (sym_vendor) {
@@ -1372,7 +1376,8 @@
 size_t Module::FindFunctionSymbols(const ConstString &name,
                                    uint32_t name_type_mask,
                                    SymbolContextList &sc_list) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "Module::FindSymbolsFunctions (name = %s, mask = 0x%8.8x)",
                      name.AsCString(), name_type_mask);
   SymbolVendor *sym_vendor = GetSymbolVendor();
@@ -1390,9 +1395,9 @@
   // No need to protect this call using m_mutex all other method calls are
   // already thread safe.
 
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
-      "Module::FindSymbolsWithNameAndType (name = %s, type = %i)",
+      func_cat, "Module::FindSymbolsWithNameAndType (name = %s, type = %i)",
       name.AsCString(), symbol_type);
   const size_t initial_size = sc_list.GetSize();
   SymbolVendor *sym_vendor = GetSymbolVendor();
@@ -1413,8 +1418,9 @@
   // No need to protect this call using m_mutex all other method calls are
   // already thread safe.
 
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
+      func_cat,
       "Module::FindSymbolsMatchingRegExAndType (regex = %s, type = %i)",
       regex.GetText().str().c_str(), symbol_type);
   const size_t initial_size = sc_list.GetSize();
Index: lldb/trunk/source/Core/Timer.cpp
===================================================================
--- lldb/trunk/source/Core/Timer.cpp
+++ lldb/trunk/source/Core/Timer.cpp
@@ -27,8 +27,8 @@
 #define TIMER_INDENT_AMOUNT 2
 
 namespace {
-typedef std::map<const char *, std::chrono::nanoseconds> TimerCategoryMap;
 typedef std::vector<Timer *> TimerStack;
+static std::atomic<Timer::Category *> g_categories;
 } // end of anonymous namespace
 
 std::atomic<bool> Timer::g_quiet(true);
@@ -38,16 +38,6 @@
   return *g_file_mutex_ptr;
 }
 
-static std::mutex &GetCategoryMutex() {
-  static std::mutex g_category_mutex;
-  return g_category_mutex;
-}
-
-static TimerCategoryMap &GetCategoryMap() {
-  static TimerCategoryMap g_category_map;
-  return g_category_map;
-}
-
 static void ThreadSpecificCleanup(void *p) {
   delete static_cast<TimerStack *>(p);
 }
@@ -64,9 +54,17 @@
   return (TimerStack *)timer_stack;
 }
 
+Timer::Category::Category(const char *cat) : m_name(cat) {
+  m_nanos.store(0, std::memory_order_release);
+  Category *expected = g_categories;
+  do {
+    m_next = expected;
+  } while (!g_categories.compare_exchange_weak(expected, this));
+}
+
 void Timer::SetQuiet(bool value) { g_quiet = value; }
 
-Timer::Timer(const char *category, const char *format, ...)
+Timer::Timer(Timer::Category &category, const char *format, ...)
     : m_category(category), m_total_start(std::chrono::steady_clock::now()) {
   TimerStack *stack = GetTimerStackForCurrentThread();
   if (!stack)
@@ -114,11 +112,7 @@
     stack->back()->ChildDuration(total_dur);
 
   // Keep total results for each category so we can dump results.
-  {
-    std::lock_guard<std::mutex> guard(GetCategoryMutex());
-    TimerCategoryMap &category_map = GetCategoryMap();
-    category_map[m_category] += timer_dur;
-  }
+  m_category.m_nanos += std::chrono::nanoseconds(timer_dur).count();
 }
 
 void Timer::SetDisplayDepth(uint32_t depth) { g_display_depth = depth; }
@@ -126,33 +120,32 @@
 /* binary function predicate:
  * - returns whether a person is less than another person
  */
-static bool
-CategoryMapIteratorSortCriterion(const TimerCategoryMap::const_iterator &lhs,
-                                 const TimerCategoryMap::const_iterator &rhs) {
-  return lhs->second > rhs->second;
+
+typedef std::pair<const char *, uint64_t> TimerEntry;
+
+static bool CategoryMapIteratorSortCriterion(const TimerEntry &lhs,
+                                             const TimerEntry &rhs) {
+  return lhs.second > rhs.second;
 }
 
 void Timer::ResetCategoryTimes() {
-  std::lock_guard<std::mutex> guard(GetCategoryMutex());
-  TimerCategoryMap &category_map = GetCategoryMap();
-  category_map.clear();
+  for (Category *i = g_categories; i; i = i->m_next)
+    i->m_nanos.store(0, std::memory_order_release);
 }
 
 void Timer::DumpCategoryTimes(Stream *s) {
-  std::lock_guard<std::mutex> guard(GetCategoryMutex());
-  TimerCategoryMap &category_map = GetCategoryMap();
-  std::vector<TimerCategoryMap::const_iterator> sorted_iterators;
-  TimerCategoryMap::const_iterator pos, end = category_map.end();
-  for (pos = category_map.begin(); pos != end; ++pos) {
-    sorted_iterators.push_back(pos);
+  std::vector<TimerEntry> sorted;
+  for (Category *i = g_categories; i; i = i->m_next) {
+    uint64_t nanos = i->m_nanos.load(std::memory_order_acquire);
+    if (nanos)
+      sorted.push_back(std::make_pair(i->m_name, nanos));
   }
-  std::sort(sorted_iterators.begin(), sorted_iterators.end(),
-            CategoryMapIteratorSortCriterion);
+  if (sorted.empty())
+    return; // Later code will break without any elements.
 
-  const size_t count = sorted_iterators.size();
-  for (size_t i = 0; i < count; ++i) {
-    const auto timer = sorted_iterators[i]->second;
-    s->Printf("%.9f sec for %s\n", std::chrono::duration<double>(timer).count(),
-              sorted_iterators[i]->first);
-  }
+  // Sort by time
+  std::sort(sorted.begin(), sorted.end(), CategoryMapIteratorSortCriterion);
+
+  for (const auto &timer : sorted)
+    s->Printf("%.9f sec for %s\n", timer.second / 1000000000., timer.first);
 }
Index: lldb/trunk/source/Host/common/Symbols.cpp
===================================================================
--- lldb/trunk/source/Host/common/Symbols.cpp
+++ lldb/trunk/source/Host/common/Symbols.cpp
@@ -151,8 +151,9 @@
   const ArchSpec *arch = module_spec.GetArchitecturePtr();
   const UUID *uuid = module_spec.GetUUIDPtr();
 
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
+      func_cat,
       "LocateExecutableSymbolFileDsym (file = %s, arch = %s, uuid = %p)",
       exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
       arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);
@@ -175,9 +176,9 @@
   const FileSpec *exec_fspec = module_spec.GetFileSpecPtr();
   const ArchSpec *arch = module_spec.GetArchitecturePtr();
   const UUID *uuid = module_spec.GetUUIDPtr();
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
-      "LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)",
+      func_cat, "LocateExecutableObjectFile (file = %s, arch = %s, uuid = %p)",
       exec_fspec ? exec_fspec->GetFilename().AsCString("<NULL>") : "<NULL>",
       arch ? arch->GetArchitectureName() : "<NULL>", (const void *)uuid);
 
Index: lldb/trunk/source/Initialization/SystemInitializerCommon.cpp
===================================================================
--- lldb/trunk/source/Initialization/SystemInitializerCommon.cpp
+++ lldb/trunk/source/Initialization/SystemInitializerCommon.cpp
@@ -72,7 +72,8 @@
   llvm::EnablePrettyStackTrace();
   InitializeLog();
   HostInfo::Initialize();
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   process_gdb_remote::ProcessGDBRemoteLog::Initialize();
 
@@ -102,7 +103,8 @@
 }
 
 void SystemInitializerCommon::Terminate() {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
   ObjectContainerBSDArchive::Terminate();
   ObjectFileELF::Terminate();
   ObjectFilePECOFF::Terminate();
Index: lldb/trunk/source/Interpreter/CommandInterpreter.cpp
===================================================================
--- lldb/trunk/source/Interpreter/CommandInterpreter.cpp
+++ lldb/trunk/source/Interpreter/CommandInterpreter.cpp
@@ -169,7 +169,8 @@
 }
 
 void CommandInterpreter::Initialize() {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   CommandReturnObject result;
 
@@ -391,7 +392,8 @@
 }
 
 void CommandInterpreter::LoadCommandDictionary() {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   lldb::ScriptLanguage script_language = m_debugger.GetScriptLanguage();
 
@@ -1533,8 +1535,8 @@
   if (log)
     log->Printf("Processing command: %s", command_line);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "Handling command: %s.",
-                     command_line);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "Handling command: %s.", command_line);
 
   if (!no_context_switching)
     UpdateExecutionContext(override_context);
Index: lldb/trunk/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
===================================================================
--- lldb/trunk/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
+++ lldb/trunk/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp
@@ -1803,7 +1803,8 @@
 void AppleObjCRuntimeV2::UpdateISAToDescriptorMapIfNeeded() {
   Log *log(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS | LIBLLDB_LOG_TYPES));
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   // Else we need to check with our process to see when the map was updated.
   Process *process = GetProcess();
Index: lldb/trunk/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.cpp
===================================================================
--- lldb/trunk/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.cpp
+++ lldb/trunk/source/Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.cpp
@@ -301,8 +301,9 @@
     DataExtractor data;
     data.SetData(data_sp, data_offset, length);
     if (file && data_sp && ObjectContainerBSDArchive::MagicBytesMatch(data)) {
+      static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
       Timer scoped_timer(
-          LLVM_PRETTY_FUNCTION,
+          func_cat,
           "ObjectContainerBSDArchive::CreateInstance (module = %s, file = "
           "%p, file_offset = 0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")",
           module_sp->GetFileSpec().GetPath().c_str(),
Index: lldb/trunk/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
===================================================================
--- lldb/trunk/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
+++ lldb/trunk/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
@@ -727,8 +727,9 @@
             uint32_t core_notes_crc = 0;
 
             if (!gnu_debuglink_crc) {
+              static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
               lldb_private::Timer scoped_timer(
-                  LLVM_PRETTY_FUNCTION,
+                  func_cat,
                   "Calculating module crc32 %s with size %" PRIu64 " KiB",
                   file.GetLastPathComponent().AsCString(),
                   (file.GetByteSize() - file_offset) / 1024);
Index: lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
===================================================================
--- lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
+++ lldb/trunk/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
@@ -2121,8 +2121,8 @@
 }
 
 size_t ObjectFileMachO::ParseSymtab() {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                     "ObjectFileMachO::ParseSymtab () module = %s",
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "ObjectFileMachO::ParseSymtab () module = %s",
                      m_file.GetFilename().AsCString(""));
   ModuleSP module_sp(GetModule());
   if (!module_sp)
Index: lldb/trunk/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
===================================================================
--- lldb/trunk/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
+++ lldb/trunk/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp
@@ -928,7 +928,8 @@
 };
 
 void ScriptInterpreterPython::ExecuteInterpreterLoop() {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   Debugger &debugger = GetCommandInterpreter().GetDebugger();
 
@@ -1995,7 +1996,8 @@
     StructuredData::ObjectSP &callee_wrapper_sp,
     const TypeSummaryOptions &options, std::string &retval) {
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   if (!valobj.get()) {
     retval.assign("<no object>");
@@ -2019,8 +2021,8 @@
       {
         TypeSummaryOptionsSP options_sp(new TypeSummaryOptions(options));
 
-        Timer scoped_timer("g_swig_typescript_callback",
-                           "g_swig_typescript_callback");
+        static Timer::Category func_cat("g_swig_typescript_callback");
+        Timer scoped_timer(func_cat, "g_swig_typescript_callback");
         ret_val = g_swig_typescript_callback(
             python_function_name, GetSessionDictionary().get(), valobj,
             &new_callee, options_sp, retval);
@@ -3102,7 +3104,8 @@
 
   g_initialized = true;
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
 
   // RAII-based initialization which correctly handles multiple-initialization,
   // version-
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFCompileUnit.cpp
@@ -135,8 +135,9 @@
   if ((cu_die_only && initial_die_array_size > 0) || initial_die_array_size > 1)
     return 0; // Already parsed
 
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
+      func_cat,
       "%8.8x: DWARFCompileUnit::ExtractDIEsIfNeeded( cu_die_only = %i )",
       m_offset, cu_die_only);
 
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugAranges.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugAranges.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugAranges.cpp
@@ -110,7 +110,8 @@
 }
 
 void DWARFDebugAranges::Sort(bool minimize) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s this = %p", LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s this = %p", LLVM_PRETTY_FUNCTION,
                      static_cast<void *>(this));
 
   Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_ARANGES));
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp
@@ -484,9 +484,9 @@
 
   const dw_offset_t debug_line_offset = *offset_ptr;
 
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION,
-      "DWARFDebugLine::ParseStatementTable (.debug_line[0x%8.8x])",
+      func_cat, "DWARFDebugLine::ParseStatementTable (.debug_line[0x%8.8x])",
       debug_line_offset);
 
   if (!ParsePrologue(debug_line_data, offset_ptr, prologue.get())) {
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugPubnames.cpp
@@ -25,7 +25,8 @@
 DWARFDebugPubnames::DWARFDebugPubnames() : m_sets() {}
 
 bool DWARFDebugPubnames::Extract(const DWARFDataExtractor &data) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "DWARFDebugPubnames::Extract (byte_size = %" PRIu64 ")",
                      (uint64_t)data.GetByteSize());
   Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_PUBNAMES));
@@ -52,7 +53,8 @@
 }
 
 bool DWARFDebugPubnames::GeneratePubnames(SymbolFileDWARF *dwarf2Data) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "DWARFDebugPubnames::GeneratePubnames (data = %p)",
                      static_cast<void *>(dwarf2Data));
 
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -666,8 +666,9 @@
 
 DWARFDebugInfo *SymbolFileDWARF::DebugInfo() {
   if (m_info.get() == NULL) {
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s this = %p",
-                       LLVM_PRETTY_FUNCTION, static_cast<void *>(this));
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat, "%s this = %p", LLVM_PRETTY_FUNCTION,
+                       static_cast<void *>(this));
     if (get_debug_info_data().GetByteSize() > 0) {
       m_info.reset(new DWARFDebugInfo());
       if (m_info.get()) {
@@ -703,8 +704,9 @@
 
 DWARFDebugRanges *SymbolFileDWARF::DebugRanges() {
   if (m_ranges.get() == NULL) {
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s this = %p",
-                       LLVM_PRETTY_FUNCTION, static_cast<void *>(this));
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat, "%s this = %p", LLVM_PRETTY_FUNCTION,
+                       static_cast<void *>(this));
     if (get_debug_ranges_data().GetByteSize() > 0) {
       m_ranges.reset(new DWARFDebugRanges());
       if (m_ranges.get())
@@ -1666,10 +1668,12 @@
 uint32_t SymbolFileDWARF::ResolveSymbolContext(const Address &so_addr,
                                                uint32_t resolve_scope,
                                                SymbolContext &sc) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "SymbolFileDWARF::"
-                                           "ResolveSymbolContext (so_addr = { "
-                                           "section = %p, offset = 0x%" PRIx64
-                                           " }, resolve_scope = 0x%8.8x)",
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
+                     "SymbolFileDWARF::"
+                     "ResolveSymbolContext (so_addr = { "
+                     "section = %p, offset = 0x%" PRIx64
+                     " }, resolve_scope = 0x%8.8x)",
                      static_cast<void *>(so_addr.GetSection().get()),
                      so_addr.GetOffset(), resolve_scope);
   uint32_t resolved = 0;
@@ -1927,8 +1931,9 @@
   if (m_indexed)
     return;
   m_indexed = true;
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
   Timer scoped_timer(
-      LLVM_PRETTY_FUNCTION, "SymbolFileDWARF::Index (%s)",
+      func_cat, "SymbolFileDWARF::Index (%s)",
       GetObjectFile()->GetFileSpec().GetFilename().AsCString("<Unknown>"));
 
   DWARFDebugInfo *debug_info = DebugInfo();
@@ -2390,8 +2395,8 @@
                                const CompilerDeclContext *parent_decl_ctx,
                                uint32_t name_type_mask, bool include_inlines,
                                bool append, SymbolContextList &sc_list) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                     "SymbolFileDWARF::FindFunctions (name = '%s')",
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "SymbolFileDWARF::FindFunctions (name = '%s')",
                      name.AsCString());
 
   // eFunctionNameTypeAuto should be pre-resolved by a call to
@@ -2670,8 +2675,8 @@
 uint32_t SymbolFileDWARF::FindFunctions(const RegularExpression &regex,
                                         bool include_inlines, bool append,
                                         SymbolContextList &sc_list) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                     "SymbolFileDWARF::FindFunctions (regex = '%s')",
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "SymbolFileDWARF::FindFunctions (regex = '%s')",
                      regex.GetText().str().c_str());
 
   Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_LOOKUPS));
Index: lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
+++ lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp
@@ -991,7 +991,8 @@
     const ConstString &name, const CompilerDeclContext *parent_decl_ctx,
     uint32_t name_type_mask, bool include_inlines, bool append,
     SymbolContextList &sc_list) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "SymbolFileDWARFDebugMap::FindFunctions (name = %s)",
                      name.GetCString());
 
@@ -1018,7 +1019,8 @@
                                                 bool include_inlines,
                                                 bool append,
                                                 SymbolContextList &sc_list) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "SymbolFileDWARFDebugMap::FindFunctions (regex = '%s')",
                      regex.GetText().str().c_str());
 
@@ -1044,7 +1046,8 @@
 size_t SymbolFileDWARFDebugMap::GetTypes(SymbolContextScope *sc_scope,
                                          uint32_t type_mask,
                                          TypeList &type_list) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat,
                      "SymbolFileDWARFDebugMap::GetTypes (type_mask = 0x%8.8x)",
                      type_mask);
 
Index: lldb/trunk/source/Plugins/SymbolVendor/ELF/SymbolVendorELF.cpp
===================================================================
--- lldb/trunk/source/Plugins/SymbolVendor/ELF/SymbolVendorELF.cpp
+++ lldb/trunk/source/Plugins/SymbolVendor/ELF/SymbolVendorELF.cpp
@@ -92,8 +92,8 @@
   if (file_spec_list.IsEmpty())
     return NULL;
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                     "SymbolVendorELF::CreateInstance (module = %s)",
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "SymbolVendorELF::CreateInstance (module = %s)",
                      module_sp->GetFileSpec().GetPath().c_str());
 
   for (size_t idx = 0; idx < file_spec_list.GetSize(); ++idx) {
Index: lldb/trunk/source/Symbol/DWARFCallFrameInfo.cpp
===================================================================
--- lldb/trunk/source/Symbol/DWARFCallFrameInfo.cpp
+++ lldb/trunk/source/Symbol/DWARFCallFrameInfo.cpp
@@ -419,7 +419,8 @@
   if (m_fde_index_initialized) // if two threads hit the locker
     return;
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s - %s", LLVM_PRETTY_FUNCTION,
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s - %s", LLVM_PRETTY_FUNCTION,
                      m_objfile.GetFileSpec().GetFilename().AsCString(""));
 
   bool clear_address_zeroth_bit = false;
Index: lldb/trunk/source/Symbol/ObjectFile.cpp
===================================================================
--- lldb/trunk/source/Symbol/ObjectFile.cpp
+++ lldb/trunk/source/Symbol/ObjectFile.cpp
@@ -37,8 +37,9 @@
   ObjectFileSP object_file_sp;
 
   if (module_sp) {
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
     Timer scoped_timer(
-        LLVM_PRETTY_FUNCTION,
+        func_cat,
         "ObjectFile::FindPlugin (module = %s, file = %p, file_offset = "
         "0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")",
         module_sp->GetFileSpec().GetPath().c_str(),
@@ -176,9 +177,11 @@
   ObjectFileSP object_file_sp;
 
   if (module_sp) {
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION, "ObjectFile::FindPlugin (module = "
-                                             "%s, process = %p, header_addr = "
-                                             "0x%" PRIx64 ")",
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat,
+                       "ObjectFile::FindPlugin (module = "
+                       "%s, process = %p, header_addr = "
+                       "0x%" PRIx64 ")",
                        module_sp->GetFileSpec().GetPath().c_str(),
                        static_cast<void *>(process_sp.get()), header_addr);
     uint32_t idx;
Index: lldb/trunk/source/Symbol/Symtab.cpp
===================================================================
--- lldb/trunk/source/Symbol/Symtab.cpp
+++ lldb/trunk/source/Symbol/Symtab.cpp
@@ -220,7 +220,8 @@
   // Protected function, no need to lock mutex...
   if (!m_name_indexes_computed) {
     m_name_indexes_computed = true;
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
     // Create the name index vector to be able to quickly search by name
     const size_t num_symbols = m_symbols.size();
 #if 1
@@ -433,7 +434,8 @@
                                     bool add_demangled, bool add_mangled,
                                     NameToIndexMap &name_to_index_map) const {
   if (add_demangled || add_mangled) {
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
     std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
     // Create the name index vector to be able to quickly search by name
@@ -595,7 +597,8 @@
                                       bool remove_duplicates) const {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
   // No need to sort if we have zero or one items...
   if (indexes.size() <= 1)
     return;
@@ -621,7 +624,8 @@
                                              std::vector<uint32_t> &indexes) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
   if (symbol_name) {
     if (!m_name_indexes_computed)
       InitNameIndexes();
@@ -637,7 +641,8 @@
                                              std::vector<uint32_t> &indexes) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
   if (symbol_name) {
     const size_t old_size = indexes.size();
     if (!m_name_indexes_computed)
@@ -766,7 +771,8 @@
                                       std::vector<uint32_t> &symbol_indexes) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
   // Initialize all of the lookup by name indexes before converting NAME
   // to a uniqued string NAME_STR below.
   if (!m_name_indexes_computed)
@@ -785,7 +791,8 @@
     Visibility symbol_visibility, std::vector<uint32_t> &symbol_indexes) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
   // Initialize all of the lookup by name indexes before converting NAME
   // to a uniqued string NAME_STR below.
   if (!m_name_indexes_computed)
@@ -817,7 +824,8 @@
                                                Visibility symbol_visibility) {
   std::lock_guard<std::recursive_mutex> guard(m_mutex);
 
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION, "%s", LLVM_PRETTY_FUNCTION);
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(func_cat, "%s", LLVM_PRETTY_FUNCTION);
   if (!m_name_indexes_computed)
     InitNameIndexes();
 
Index: lldb/trunk/source/Target/Target.cpp
===================================================================
--- lldb/trunk/source/Target/Target.cpp
+++ lldb/trunk/source/Target/Target.cpp
@@ -1235,7 +1235,8 @@
   ClearModules(false);
 
   if (executable_sp) {
-    Timer scoped_timer(LLVM_PRETTY_FUNCTION,
+    static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+    Timer scoped_timer(func_cat,
                        "Target::SetExecutableModule (executable = '%s')",
                        executable_sp->GetFileSpec().GetPath().c_str());
 
Index: lldb/trunk/source/Target/TargetList.cpp
===================================================================
--- lldb/trunk/source/Target/TargetList.cpp
+++ lldb/trunk/source/Target/TargetList.cpp
@@ -325,10 +325,10 @@
                                         lldb::PlatformSP &platform_sp,
                                         lldb::TargetSP &target_sp,
                                         bool is_dummy_target) {
-  Timer scoped_timer(LLVM_PRETTY_FUNCTION,
-                     "TargetList::CreateTarget (file = '%s', arch = '%s')",
-                     user_exe_path.str().c_str(),
-                     specified_arch.GetArchitectureName());
+  static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+  Timer scoped_timer(
+      func_cat, "TargetList::CreateTarget (file = '%s', arch = '%s')",
+      user_exe_path.str().c_str(), specified_arch.GetArchitectureName());
   Status error;
 
   ArchSpec arch(specified_arch);
Index: lldb/trunk/unittests/Core/TimerTest.cpp
===================================================================
--- lldb/trunk/unittests/Core/TimerTest.cpp
+++ lldb/trunk/unittests/Core/TimerTest.cpp
@@ -18,7 +18,8 @@
 TEST(TimerTest, CategoryTimes) {
   Timer::ResetCategoryTimes();
   {
-    Timer t("CAT1", "");
+    static Timer::Category tcat("CAT1");
+    Timer t(tcat, "");
     std::this_thread::sleep_for(std::chrono::milliseconds(10));
   }
   StreamString ss;
@@ -32,14 +33,18 @@
 TEST(TimerTest, CategoryTimesNested) {
   Timer::ResetCategoryTimes();
   {
-    Timer t1("CAT1", "");
+    static Timer::Category tcat1("CAT1");
+    Timer t1(tcat1, "");
     std::this_thread::sleep_for(std::chrono::milliseconds(10));
-    Timer t2("CAT1", "");
+    // Explicitly testing the same category as above.
+    Timer t2(tcat1, "");
     std::this_thread::sleep_for(std::chrono::milliseconds(10));
   }
   StreamString ss;
   Timer::DumpCategoryTimes(&ss);
   double seconds;
+  // It should only appear once.
+  ASSERT_EQ(ss.GetString().count("CAT1"), 1U);
   ASSERT_EQ(1, sscanf(ss.GetData(), "%lf sec for CAT1", &seconds));
   EXPECT_LT(0.002, seconds);
   EXPECT_GT(0.2, seconds);
@@ -48,9 +53,11 @@
 TEST(TimerTest, CategoryTimes2) {
   Timer::ResetCategoryTimes();
   {
-    Timer t1("CAT1", "");
+    static Timer::Category tcat1("CAT1");
+    Timer t1(tcat1, "");
     std::this_thread::sleep_for(std::chrono::milliseconds(100));
-    Timer t2("CAT2", "");
+    static Timer::Category tcat2("CAT2");
+    Timer t2(tcat2, "");
     std::this_thread::sleep_for(std::chrono::milliseconds(10));
   }
   StreamString ss;