5.0.1 - 2026-07-29

🚀 Highlights

More precise measurements by default

cycle-estimation is now enabled by default, giving more precise benchmark cycle estimation in Simulation mode. See docs.

New: allocation exclusion

Opt in to exclude-allocations to remove allocator time from benchmarks in Simulation mode and reduce variance. See docs.

samply-based profiler by default on Linux

The walltime profiler now uses samply on all OSes. Set CODSPEED_WALLTIME_PROFILER=perf to restore the previous behavior.

⚠️ Breaking changes

• cycle-estimation is now enabled by default (see above)
• The samply-based profiler is now the default on Linux; set CODSPEED_WALLTIME_PROFILER=perf to revert

Details

🚀 Features

• Load eBPF through a delegated BPF token by @GuillaumeLagrange
• Enable cycle estimation and allocation exclusion by default by @not-matthias in #461
• Make samply profiler default for all OSes (#472) by @GuillaumeLagrange in #475

🐛 Bug Fixes

• Classify mapped libraries without init-userns privilege by @GuillaumeLagrange
• Disable allocator exclusion by default (#489) by @not-matthias in #489

💼 Other

• Bump the memtrack pin to 1.4.0 by @adriencaccia in #484

🏗️ Refactor

• Hook-based CPU isolation for the walltime runner by @GuillaumeLagrange

🧪 Testing

• Run every tracking test under both BPF variants by @GuillaumeLagrange

⚙️ Internals

• Bump submodule to reduce debug info server timeouts by @GuillaumeLagrange
• Make tests run release builds of the binaries by @GuillaumeLagrange in #456
• Update submodule to fix fmt and ignore ubuntu debuginfod serv by @GuillaumeLagrange

Install codspeed-runner 5.0.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.1

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