5.2.0 - 2026-08-24

Release Notes

🚀 Features

• Add a --simulation-track-subprocess flag that enables tracking benchmark subprocesses, along with per-thread dumps by @GuillaumeLagrange in #493 and #513
• Collect RSS via rss_stat and folio-rmap reconstruction by @not-matthias in #453

🐛 Bug Fixes

• Fix cache behavior that was causing an apt reinstall of the libc debug symbols despite cache restore by @GuillaumeLagrange in #509

⚙️ Internals

• Bump pinned valgrind-codspeed to 3.26.0-0codspeed7 by @adriencaccia in #515
  • fix(callgrind): represent os threads under --separate-threads=yes by @GuillaumeLagrange in CodSpeedHQ/valgrind-codspeed#24
  • feat(callgrind): track subprocesses across fork and exec by @GuillaumeLagrange in CodSpeedHQ/valgrind-codspeed#25
• Stop skipping the rustup wrapper for valgrind by @GuillaumeLagrange in #493

Install codspeed-runner 5.2.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.2.0/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.2.0

File	Platform	Checksum
codspeed-runner-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
codspeed-runner-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
codspeed-runner-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum