diff --git a/libc/benchmarks/automemcpy/lib/ResultAnalyzerMain.cpp b/libc/benchmarks/automemcpy/lib/ResultAnalyzerMain.cpp
--- a/libc/benchmarks/automemcpy/lib/ResultAnalyzerMain.cpp
+++ b/libc/benchmarks/automemcpy/lib/ResultAnalyzerMain.cpp
@@ -20,6 +20,11 @@
 static cl::list<std::string> InputFilenames(cl::Positional, cl::OneOrMore,
                                             cl::desc("<input json files>"));
 
+// User can filter the distributions to be taken into account.
+static cl::list<std::string> FilterDistributions(
+    "filter-distributions", cl::ZeroOrMore,
+    cl::desc("<list of valid distribution names to keep, all if unspecified>"));
+
 namespace automemcpy {
 
 // This is defined in the autogenerated 'Implementations.cpp' file.
@@ -121,6 +126,15 @@
     llvm::append_range(Samples, Result.Samples);
   }
 
+  if (!FilterDistributions.empty()) {
+    llvm::StringSet<> ValidDistributions;
+    ValidDistributions.insert(FilterDistributions.begin(),
+                              FilterDistributions.end());
+    llvm::erase_if(Samples, [&ValidDistributions](const Sample &S) {
+      return !ValidDistributions.contains(S.Id.Distribution.Name);
+    });
+  }
+
   // Extracts median of throughputs.
   std::vector<FunctionData> Functions = getThroughputs(Samples);
   fillScores(Functions);