[libcxx-commits] [libcxx] [libc++] Fix append_range and prepend_range benchmarks (PR #216038)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne created https://github.com/llvm/llvm-project/pull/216038

They were using clear(), which keeps the storage around, instead of starting over from an empty container.

Fixes #209499

>From a6cbb82f31bf99b36b232986c709adeae2d25373 Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionne.2 at gmail.com>
Date: Thu, 13 Aug 2026 08:39:33 -0400
Subject: [PATCH] [libc++] Fix append_range and prepend_range benchmarks

They were using clear(), which keeps the storage around, instead of
starting over from an empty container.

Fixes #209499
---
 .../containers/sequence/sequence_container_benchmarks.h       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libcxx/test/benchmarks/containers/sequence/sequence_container_benchmarks.h b/libcxx/test/benchmarks/containers/sequence/sequence_container_benchmarks.h
index ff7b7fe2af018..68cd74a9ca782 100644
--- a/libcxx/test/benchmarks/containers/sequence/sequence_container_benchmarks.h
+++ b/libcxx/test/benchmarks/containers/sequence/sequence_container_benchmarks.h
@@ -413,7 +413,7 @@ void sequence_container_benchmarks(std::string container) {
           DoNotOptimizeData(c);
 
           state.PauseTiming();
-          c.clear();
+          c = Container();
           state.ResumeTiming();
         }
       });
@@ -440,7 +440,7 @@ void sequence_container_benchmarks(std::string container) {
           DoNotOptimizeData(c);
 
           state.PauseTiming();
-          c.clear();
+          c = Container();
           state.ResumeTiming();
         }
       });