Index: COFF/Driver.cpp
===================================================================
--- COFF/Driver.cpp
+++ COFF/Driver.cpp
@@ -19,6 +19,7 @@
 #include "lld/Common/Driver.h"
 #include "lld/Common/ErrorHandler.h"
 #include "lld/Common/Memory.h"
+#include "lld/Common/Summary.h"
 #include "lld/Common/Threads.h"
 #include "lld/Common/Timer.h"
 #include "lld/Common/Version.h"
@@ -999,6 +1000,9 @@
   if (Args.hasArg(OPT_show_timing))
     Config->ShowTiming = true;
 
+  if (Args.hasArg(OPT_summary))
+    Summary::Enabled = true;
+
   ScopedTimer T(Timer::root());
   // Handle --version, which is an lld extension. This option is a bit odd
   // because it doesn't start with "/", but we deliberately chose "--" to
@@ -1714,8 +1718,11 @@
 
   // Stop early so we can print the results.
   Timer::root().stop();
-  if (Config->ShowTiming)
+  if (Config->ShowTiming) {
+    if (Summary::Enabled)
+      message("");
     Timer::root().print();
+  }
 }
 
 } // namespace coff
Index: COFF/Options.td
===================================================================
--- COFF/Options.td
+++ COFF/Options.td
@@ -171,6 +171,7 @@
 def lldmap : F<"lldmap">;
 def lldmap_file : Joined<["/", "-"], "lldmap:">;
 def show_timing : F<"time">;
+def summary : F<"summary">;
 
 //==============================================================================
 // The flags below do nothing. They are defined only for link.exe compatibility.
Index: COFF/PDB.cpp
===================================================================
--- COFF/PDB.cpp
+++ COFF/PDB.cpp
@@ -14,6 +14,7 @@
 #include "Symbols.h"
 #include "Writer.h"
 #include "lld/Common/ErrorHandler.h"
+#include "lld/Common/Summary.h"
 #include "lld/Common/Timer.h"
 #include "lld/Common/Threads.h"
 #include "llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h"
@@ -1314,6 +1315,8 @@
 // Add all object files to the PDB. Merge .debug$T sections into IpiData and
 // TpiData.
 void PDBLinker::addObjectsToPDB() {
+  Summary::print(ObjFile::Instances.size(), "Input OBJ files (expanded from all cmd-line inputs)");
+
   ScopedTimer T1(AddObjectsTimer);
   for (ObjFile *File : ObjFile::Instances)
     addObjFile(File);
@@ -1321,6 +1324,12 @@
   Builder.getStringTableBuilder().setStrings(PDBStrTab);
   T1.stop();
 
+  Summary::print(TypeServerIndexMappings.size(), "Dependent PDB files");
+  Summary::print(PrecompTypeIndexMappings.size(), "Dependent PCH OBJ files");
+  Summary::print(GlobalTypeTable.size() + GlobalIDTable.size(),
+                   "Output merged type records");
+  Summary::print(PDBStrTab.size(), "Output PDB strings");
+
   // Construct TPI and IPI stream contents.
   ScopedTimer T2(TpiStreamLayoutTimer);
   addTypeInfo(Builder.getTpiBuilder(), getTypeTable());
@@ -1345,6 +1354,8 @@
     });
     for (const PublicSym32 &Pub : Publics)
       GsiBuilder.addPublicSymbol(Pub);
+
+    Summary::print(Publics.size(), "Output global symbol records");
   }
 }
 
Index: Common/CMakeLists.txt
===================================================================
--- Common/CMakeLists.txt
+++ Common/CMakeLists.txt
@@ -33,6 +33,7 @@
   Memory.cpp
   Reproduce.cpp
   Strings.cpp
+  Summary.cpp
   TargetOptionsCommandFlags.cpp
   Threads.cpp
   Timer.cpp
Index: Common/Summary.cpp
===================================================================
--- Common/Summary.cpp
+++ Common/Summary.cpp
@@ -0,0 +1,33 @@
+//===- Summary.cpp --------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lld/Common/Summary.h"
+#include "lld/Common/ErrorHandler.h"
+#include "llvm/ADT/SmallString.h"
+
+using namespace lld;
+using namespace llvm;
+
+bool Summary::Enabled = false;
+
+void Summary::print(uint64_t Value, llvm::StringRef S) {
+  if (!Enabled)
+    return;
+  if (!Value)
+    return;
+  SmallString<256> Buffer;
+  raw_svector_ostream Stream(Buffer);
+  static bool Banner = false;
+  if (!Banner) {
+    Banner = true;
+    Stream << center_justify("Summary", 80) << '\n'
+           << std::string(80, '-') << '\n';
+  }
+  Stream << format_decimal(Value, 15) << " " << S;
+  message(Buffer);
+}
Index: include/lld/Common/Summary.h
===================================================================
--- include/lld/Common/Summary.h
+++ include/lld/Common/Summary.h
@@ -0,0 +1,23 @@
+//===- Summary.h ----------------------------------------------*- C -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_COMMON_SUMMARY_H
+#define LLD_COMMON_SUMMARY_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Any.h"
+ 
+namespace lld {
+namespace Summary {
+extern bool Enabled;
+
+void print(uint64_t Value, llvm::StringRef S);
+}
+} // namespace lld
+
+#endif
Index: test/COFF/pdb-type-server-simple.test
===================================================================
--- test/COFF/pdb-type-server-simple.test
+++ test/COFF/pdb-type-server-simple.test
@@ -20,7 +20,7 @@
 RUN: yaml2obj %S/Inputs/pdb-type-server-simple-a.yaml -o a.obj
 RUN: yaml2obj %S/Inputs/pdb-type-server-simple-b.yaml -o b.obj
 RUN: llvm-pdbutil yaml2pdb %S/Inputs/pdb-type-server-simple-ts.yaml -pdb ts.pdb
-RUN: lld-link a.obj b.obj -entry:main -debug -out:t.exe -pdb:t.pdb -nodefaultlib
+RUN: lld-link a.obj b.obj -entry:main -debug -out:t.exe -pdb:t.pdb -nodefaultlib /summary | FileCheck %s -check-prefix SUMMARY
 RUN: llvm-pdbutil dump -symbols -types -ids -globals %t/t.pdb | FileCheck %s
 
 
@@ -95,3 +95,10 @@
 CHECK:      196 | S_END [size = 4]
 CHECK:      200 | S_BUILDINFO [size = 8] BuildId = `[[B_BUILD]]`
 CHECK-LABEL:   Mod 0002 | `* Linker *`:
+
+SUMMARY:                                     Summary
+SUMMARY-NEXT: --------------------------------------------------------------------------------
+SUMMARY-NEXT:               2 Input OBJ files (expanded from all cmd-line inputs)
+SUMMARY-NEXT:               1 Dependent PDB files
+SUMMARY-NEXT:               3 Output PDB strings
+SUMMARY-NEXT:               2 Output global symbol records
\ No newline at end of file
Index: test/COFF/precomp-link.test
===================================================================
--- test/COFF/precomp-link.test
+++ test/COFF/precomp-link.test
@@ -1,4 +1,4 @@
-RUN: lld-link %S/Inputs/precomp-a.obj %S/Inputs/precomp-b.obj %S/Inputs/precomp.obj /nodefaultlib /entry:main /debug /pdb:%t.pdb /out:%t.exe /opt:ref /opt:icf
+RUN: lld-link %S/Inputs/precomp-a.obj %S/Inputs/precomp-b.obj %S/Inputs/precomp.obj /nodefaultlib /entry:main /debug /pdb:%t.pdb /out:%t.exe /opt:ref /opt:icf /summary | FileCheck %s -check-prefix SUMMARY
 RUN: llvm-pdbutil dump -types %t.pdb | FileCheck %s
 
 RUN: lld-link %S/Inputs/precomp.obj %S/Inputs/precomp-a.obj %S/Inputs/precomp-b.obj /nodefaultlib /entry:main /debug /pdb:%t.pdb /out:%t.exe /opt:ref /opt:icf
@@ -18,6 +18,13 @@
 CHECK-NOT: LF_PRECOMP
 CHECK-NOT: LF_ENDPRECOMP
 
+SUMMARY:                                     Summary
+SUMMARY-NEXT: --------------------------------------------------------------------------------
+SUMMARY-NEXT:               3 Input OBJ files (expanded from all cmd-line inputs)
+SUMMARY-NEXT:               1 Dependent PCH OBJ files
+SUMMARY-NEXT:               5 Output PDB strings
+SUMMARY-NEXT:               3 Output global symbol records
+
 // precomp.h
 #pragma once
 int Function(char A);