5.1.0 - 2026-08-18

Release Notes

🚀 Features

• Support CircleCI for GitHub repositories by @fargito in [#482]

📚 Documentation

• Bump action version to v5 (#488) by @adriencaccia in #488

Install codspeed-runner 5.1.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.1.0/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.1.0

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

v5.0.3-alpha.5

Install codspeed-runner 5.0.3-alpha.5

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.3-alpha.5/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.3-alpha.5

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

v5.0.3-alpha.3

Install codspeed-runner 5.0.3-alpha.3

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.3-alpha.3/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.3-alpha.3

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

v5.0.3-alpha.2

Install codspeed-runner 5.0.3-alpha.2

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.3-alpha.2/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.3-alpha.2

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

v5.0.3-alpha.1

Install codspeed-runner 5.0.3-alpha.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.3-alpha.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.3-alpha.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

5.0.2 - 2026-08-06

Release Notes

🐛 Bug Fixes

• Retry complete pinned binary downloads (#499) by @art049 in #499
• Accept --exclude-allocations and --cycle-estimation without a value by @not-matthias

📚 Documentation

• Drop stale "defaults to true" wording for allocation exclusion by @not-matthias

🧪 Testing

• Align exclude_allocations fixtures with the real default by @not-matthias in #490

Install codspeed-runner 5.0.2

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.2/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.2

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

v5.0.2-alpha.1

Install codspeed-runner 5.0.2-alpha.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v5.0.2-alpha.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 5.0.2-alpha.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

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

v4.19.2-alpha.1

Install codspeed-runner 4.19.2-alpha.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v4.19.2-alpha.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.19.2-alpha.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

memtrack-v1.4.0

Install memtrack 1.4.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/memtrack-v1.4.0/memtrack-installer.sh | sh

Download memtrack 1.4.0

File	Platform	Checksum
memtrack-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
memtrack-x86_64-unknown-linux-gnu.tar.gz	x64 Linux	checksum