Release notes from action

v4.10.1

2026-01-28T11:48:57Z

Release Notes

🚀 Features

Implement codspeed use to set mode for shell session by @GuillaumeLagrange in #221
Show codspeed banner in CI when exec_harness is used by @GuillaumeLagrange
Improve the result table display (#217) by @art049 in #217

🐛 Bug Fixes

Initialize tracker before spawning sub-process by @not-matthias

🏗️ Refactor

Restructure event handling with a common header and improve event parsing by @not-matthias
Create a module for shared structs between exec and run by @GuillaumeLagrange
Remove logic from the run module by @GuillaumeLagrange
Move the cli related module inside a cli module by @GuillaumeLagrange

⚙️ Internals

chore: bump runner version to 4.10.1 by @github-actions[bot] in #182
Bump memtrack version
Turn warning about overwritten unwind_data into debug logs by @GuillaumeLagrange in #223
Fix cargo check on macOs by @adriencaccia
Remove codspeed use without argument in favor of codspeed show by @GuillaumeLagrange in #222
Add clang-format pre-commit hook by @not-matthias in #219
Save both old and new addr for realloc event by @not-matthias

Install codspeed-runner 4.10.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v4.10.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.10.1

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/codspeed/blob/main/CHANGELOG.md

Full Changelog: v4.10.0...v4.10.1

v4

2026-01-28T11:46:57Z

Release v4.10.1 🚀

v4.10.0

2026-01-27T12:16:47Z

Release Notes

🚀 Features

Add pre-commit check to sync schema with code by @GuillaumeLagrange
Add binary to generate project config schema by @GuillaumeLagrange
Add command aliases by @art049 in #216

🐛 Bug Fixes

Rename targets to benchmarks in the project_config to match spec by @GuillaumeLagrange in #220
Use child process instead of pid/perf fifo for FIFO health check by @not-matthias in #201
Make FIFO cancel-safe by @not-matthias
Dont run health check in hot path by @not-matthias
Update warning message format for go runner installation by @not-matthias in #218
Tweaked exec-harness build for gcc15+ by @art049

🏗️ Refactor

Move the whole runner logic under lib.rs to add other binaries by @GuillaumeLagrange

⚙️ Internals

Add cancel-safety test for FIFO by @not-matthias
Remove cargo check from pre-commit by @GuillaumeLagrange in #215
Remove runner_mode from project config by @GuillaumeLagrange
Improve readme by @art049 in #214

Full Runner Changelog: https://github.com/CodSpeedHQ/codspeed/blob/main/CHANGELOG.md

v4.8.2

2026-01-21T15:13:58Z

Release Notes

🐛 Bug Fixes

Check whether artifact contains any elements by @not-matthias in #204

⚙️ Internals

chore: bump runner version to 4.8.2 by @github-actions[bot] in #174

Install codspeed-runner 4.8.2

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.8.2/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.8.2

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.8.1...v4.8.2

v4.8.1

2026-01-21T14:03:43Z

Release Notes

🚀 Features

Check if memtrack produced artifacts by @not-matthias in #195
Require minimum protocol version for memtrack by @not-matthias

🐛 Bug Fixes

Add explicit min version check for memory executor by @not-matthias in #203

⚙️ Internals

chore: bump runner version to 4.8.1 by @github-actions[bot] in #173

Install codspeed-runner 4.8.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.8.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.8.1

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.8.0...v4.8.1

v4.8.0

2026-01-20T10:48:08Z

Release Notes

It is now possible to do consecutive CodSpeed run in the same GitHub job. This will allow using multiple instruments without having to spawn another job 🎉

jobs:
  codspeed:
    ...
    steps:
      ...
      - name: Build benchmarks
        run: cargo codspeed build -m analysis

      - name: Run benchmarks
        uses: CodSpeedHQ/action@v4
        with:
          run: cargo codspeed run
          mode: "simulation"

      - name: Run memory benchmarks
        uses: CodSpeedHQ/action@v4
        with:
          run: cargo codspeed run
          mode: "memory"

🚀 Features

Allow defining targets in codspeed yaml by @GuillaumeLagrange in #197
Add an stdin mode to provide multiple commands by @GuillaumeLagrange
Add a run index suffix by @fargito in #199
Make the config less strict about its config by @GuillaumeLagrange in #198
Add support for analysis mode with memory instrument by @GuillaumeLagrange
Reduce shared fifo timeout to end executor runs faster after the program has ended by @GuillaumeLagrange in #193
Use a bufwriter to save unwind data by @GuillaumeLagrange
Support dynamically and statically linked allocators by @not-matthias
Track memalign calls by @not-matthias
Accept IPC before creating tracker to avoid timeouts by @not-matthias
Add integration tests for complex cli commands by @GuillaumeLagrange
Add the full command to the uri and handle hyphens better by @GuillaumeLagrange
Add yaml project config discovery and loading by @GuillaumeLagrange in #189
Implement the walltime benchmarking algorithm by @GuillaumeLagrange
Use rayon to collect perf walltime data by @GuillaumeLagrange
Handle memory executor when displaying results by @GuillaumeLagrange in #190
Do not draw a table if there is only one benchmark by @GuillaumeLagrange
Stop using the deprecated time field and use value instead by @GuillaumeLagrange

🐛 Bug Fixes

Fix behavior when multiple benchmarks are ran by @GuillaumeLagrange
Simplify run_part_id computation by @fargito in #200
Write perf map all at once instead of line by line by @GuillaumeLagrange
Drop privileges when running commands under sudo by @not-matthias
Make walltime results stat computation the same as pytest-codspeed by @GuillaumeLagrange in #185

🏗️ Refactor

Move project config structs to interfaces mod by @GuillaumeLagrange
Move all walltime benchmarking to its dedicated module by @GuillaumeLagrange

⚙️ Internals

chore: bump runner version to 4.8.0 by @github-actions[bot] in #172
Bump memtrack version
Ignore .codspeed for exec-harness output by @GuillaumeLagrange
Remove useless clone derive for project config by @GuillaumeLagrange
Cleanup output by @not-matthias in #196
Use simulation in codspeed action by @GuillaumeLagrange in #194
Cache benchmark executable by @GuillaumeLagrange
Add prelude and remove linter dead_code suppression by @GuillaumeLagrange
Reduce logs verbosity of debug info and perf file serialization by @GuillaumeLagrange
Remove unused execve event by @not-matthias in #192
Add prelude by @not-matthias
Print number of events written to disk by @not-matthias
Switch to rust-cache to cache builds of the installed workspace binaries by @GuillaumeLagrange in #191
Install exec-harness before runner tests tests by @GuillaumeLagrange
Remove double metadata information by @GuillaumeLagrange
Add link to relevant issue for codspeed-rust metadata by @GuillaumeLagrange
Use fork supporting compressed events for linux-perf-data by @GuillaumeLagrange
Run exec-harness tests in separate CI job to prevent fifo issues by @GuillaumeLagrange
Downgrade flate because 1.1.7 was yanked by @GuillaumeLagrange

Install codspeed-runner 4.8.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.8.0/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.8.0

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.7.0...v4.8.0

v4.7.0

2026-01-13T13:35:19Z

Release Notes

🚀 Features

Check for perf compression and enable multi-events conditionally by @GuillaumeLagrange
Enable perf data compression by @art049
Add more events to perf monitoring by @GuillaumeLagrange
Add zstd compression support by @not-matthias
Add l2d cache events to perf command by @GuillaumeLagrange in #188

🐛 Bug Fixes

Do not cat stdout from command to pipe.data by @GuillaumeLagrange in #182
Drain events arriving after process terminated by @not-matthias
Support non-x86 libc paths by @not-matthias in #183

⚙️ Internals

Add instructions event, and use runner_shared for monitored events by @GuillaumeLagrange in #154
Bump memtrack version by @not-matthias in #187
Prevent gh release edit from automatically setting release as latest by @GuillaumeLagrange in #186
Add memtrack serialization benchmark by @not-matthias in #184

Install codspeed-runner 4.7.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.7.0/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.7.0

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.5.2...v4.7.0

v4.5.2

2026-01-02T10:11:27Z

Release Notes

🚀 Features

Update release flow to make sure only runner releases are marked as latest (#180) by @GuillaumeLagrange in #180
Improve UNAUTHENTICATED error message by @fargito in #181

⚙️ Internals

Bump cargo dist to 0.30.3 by @art049
chore: bump runner version to 4.5.2 by @github-actions[bot] in #167

Install codspeed-runner 4.5.2

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.5.2/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.5.2

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.5.1...v4.5.2

v4.5.1

2025-12-22T17:14:34Z

Release Notes

🚀 Features

Remove projects query from the exec polling by @GuillaumeLagrange in #173
Fetch project from API when running outside of git repo by @GuillaumeLagrange
Add get or create project repository query by @GuillaumeLagrange
Automatically install exec-harness for exec subcommand by @GuillaumeLagrange
Auto install codspeed-memtrack during executor setup by @GuillaumeLagrange
Serialize events serially to allow streamed decoding by @not-matthias in #172
Parse perf file for memmap events instead of relying on /proc/pid/maps by @GuillaumeLagrange
Use the projects upload enpdoint in exec command by @GuillaumeLagrange
Add exec subcommand and refactor run subcommand by @GuillaumeLagrange
Add exec-harness binary by @GuillaumeLagrange
Add memory executor by @not-matthias
Add memtrack crate by @not-matthias
Add artifact types by @not-matthias
Add shared fifo by @not-matthias
Add new fifo commands by @not-matthias
Support simulation for free-threaded python by @adriencaccia in #167

🐛 Bug Fixes

fix: specify package when using branch/ref by @not-matthias in #162
fix: properly check for allow_empty input by @GuillaumeLagrange in #164
Filter out arm debugging symbols by @GuillaumeLagrange in #179
Filter out empty named symbols when building perf-map by @GuillaumeLagrange in #176
Do not break support for no reason when changing integration hooks protocol version by @GuillaumeLagrange in #175
Remove dirty retry on timeout and simply increase timeout for GQL client by @GuillaumeLagrange
Stop hanging indefinitely if process fails to start in memory executor by @GuillaumeLagrange in #171
Remove the password prompt from the run_with_sudo dialog by @GuillaumeLagrange
Collect events in thread to avoid mutex overhead by @not-matthias
Convert events in thread to avoid blocking at the end by @not-matthias
Compress only when size exceeds threshold by @not-matthias
Forward environment in memory executor by @not-matthias
Fix plan test in CI by @GuillaumeLagrange in #165
Prevent nextest from running valgrind and memcheck concurrently by @GuillaumeLagrange
Stop ignoring samples by @GuillaumeLagrange
Use correct name for unwind_data trait declaration by @GuillaumeLagrange
Stop filtering out zero sized symbol by @GuillaumeLagrange
Request OIDC token after creating profile archive by @fargito in #170
Remove snapshots that were not part of lfs by @not-matthias in #166
Always print memory mapping logs by @not-matthias

🏗️ Refactor

Create a dedicated execution_context that holds runtime information by @GuillaumeLagrange
Move executor and instruments modules out of run module by @GuillaumeLagrange

⚙️ Internals

docs(examples): add go and cpp examples by @fargito in #161
Ignore some tags in the changelog
Bump protocol version by @not-matthias in #174
Add CONTRIBUTING.md by @GuillaumeLagrange
Add cargo-dist arguments for release by @GuillaumeLagrange
Reset exec-harness and memtrack crate versions to 1.0.0 ahead of first release by @GuillaumeLagrange
Switch to pr run mode plan only for pr by @GuillaumeLagrange
Add test to ensure path is properly forwarded by @not-matthias in #169
Make the exec command work outside of git repos by @GuillaumeLagrange
Do not publish memtrack to crates.io by @adriencaccia
Dont run valgrind and memory tests at the same time by @not-matthias in #164
Add test-log to see output on failures by @not-matthias
Add workspace dependencies by @not-matthias

Install codspeed-runner 4.5.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.5.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.5.1

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.4.1...v4.5.1

v4.4.1

2025-11-21T15:00:11Z

Release Notes

🚀 Features

Display oidc as announcement by @fargito
Add --allow-empty run option by @GuillaumeLagrange in #160

🐛 Bug Fixes

Do not espace trailing newlines in logger by @fargito
Make multiline logs appear correctly in summary by @fargito in #162
Request OIDC token just before upload by @fargito
Update docs links to oidc by @fargito in #159

⚙️ Internals

feat: make use of allow-empty in the ci of this action by @GuillaumeLagrange in #158
chore: bump runner version to 4.4.1 by @github-actions[bot] in #159

Install codspeed-runner 4.4.1

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.4.1/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.4.1

File	Platform	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

Full Runner Changelog: https://github.com/CodSpeedHQ/runner/blob/main/CHANGELOG.md

Full Changelog: v4.4.0...v4.4.1