Landing: 6df1f865272f

← All landings

Project / Subsystem

gcc / libstdc++

Date

2026-05-17

Author

Jonathan Wakely

Commit

6df1f865272fc95f386f5448f3a74486451bb58c

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: libstdc++
patch_id: —
commit_hash: 6df1f865272fc95f386f5448f3a74486451bb58c
source_type: github
headline: libstdc++: Reduce iterations in PSTL test for Debug Mode to avoid timeouts.
tldr: The number of iterations in a libstdc++ test for the Parallel STL (PSTL) is reduced when Debug Mode is enabled to prevent timeouts.
author: Jonathan Wakely
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • libstdc++
• testsuite
• PSTL
• debugging
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/6df1f865272fc95f386f5448f3a74486451bb58c
date: 2026-05-17T00:00:00.000Z

A libstdc++ test for the Parallel STL (PSTL) was timing out, especially on multi-core machines when running in Debug Mode. The test’s excessive thread creation combined with slower execution in Debug Mode was overloading the system. To address this, the number of iterations performed by the test has been reduced when Debug Mode is active, preventing timeouts.