[libcxx-commits] [libcxx] a41660a - [libc++] Don't run multithreaded stringstream benchmarks (#158294)

[via libcxx-commits]

Author: Louis Dionne
Date: 2025-09-15T08:47:40-04:00
New Revision: a41660aaf40b0f3b119300a8d980be52c2c4feed

URL: https://github.com/llvm/llvm-project/commit/a41660aaf40b0f3b119300a8d980be52c2c4feed
DIFF: https://github.com/llvm/llvm-project/commit/a41660aaf40b0f3b119300a8d980be52c2c4feed.diff

LOG: [libc++] Don't run multithreaded stringstream benchmarks (#158294)

This results in invalid JSON output as reported in google/benchmark#2039.

Added: 
    

Modified: 
    libcxx/test/benchmarks/stringstream.bench.cpp

Removed: 
    


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diff  --git a/libcxx/test/benchmarks/stringstream.bench.cpp b/libcxx/test/benchmarks/stringstream.bench.cpp
index b7c50a96ef51e..367024c49ac69 100644
--- a/libcxx/test/benchmarks/stringstream.bench.cpp
+++ b/libcxx/test/benchmarks/stringstream.bench.cpp
@@ -80,7 +80,7 @@ static void BM_Istream_numbers(benchmark::State& state) {
   while (state.KeepRunning())
     benchmark::DoNotOptimize(i += istream_numbers(sel.imbue));
 }
-BENCHMARK(BM_Istream_numbers)->DenseRange(0, 3)->UseRealTime()->Threads(1)->ThreadPerCpu();
+BENCHMARK(BM_Istream_numbers)->DenseRange(0, 3);
 
 static void BM_Ostream_number(benchmark::State& state) {
   LocaleSelector sel(state);
@@ -92,6 +92,6 @@ static void BM_Ostream_number(benchmark::State& state) {
     benchmark::DoNotOptimize(ss.str().c_str());
   }
 }
-BENCHMARK(BM_Ostream_number)->DenseRange(0, 3)->UseRealTime()->Threads(1)->ThreadPerCpu();
+BENCHMARK(BM_Ostream_number)->DenseRange(0, 3);
 
 BENCHMARK_MAIN();