5.4.1 - 2026-10-09

This release improves and adds support for memory flamegraphs in C++, Python and Node.js.

Release Notes

🚀 Features

• Apply the shared runtime env and node wrapper by @not-matthias
• Share the benchmark runtime env and add a node wrapper by @not-matthias
• Emit Python and Node perf maps in memory mode by @not-matthias
• Harvest perf maps and JIT unwind data for memtrack by @not-matthias

🐛 Bug Fixes

• Emit the Node perf map in memory mode by @not-matthias in #556
• Only pass --interpreted-frames-native-stack in analysis mode by @not-matthias
• Keep every placement of a module mapped more than once by @not-matthias
• Label dropped benchmarks in the comparison table (#570) by @adriencaccia in #570
• Compare mapped module identity against a mapping, not stat by @not-matthias in #563
• Restore uretprobe-hijacked return addresses in captured stacks by @not-matthias

🏗️ Refactor

• Split stack copy and hash into helpers by @not-matthias in #564

🧪 Testing

• Cover Python and Node allocations with JIT symbols by @not-matthias
• Run the executor tests against an unreleased valgrind (#571) by @lvaroqui in #571
• Reproduce uretprobe trampoline in nested allocator stacks by @not-matthias
• Run executor tests end-to-end in docker by @GuillaumeLagrange in #566

⚙️ Internals

• Pin memtrack 1.6.1 and exec-harness 1.4.0 (#575) by @adriencaccia in #575
• Add a concurrency group to the CI workflow (#573) by @lvaroqui in #573

Install codspeed-runner 5.4.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.4.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.4.1

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