4.9.0 - 2026-01-23

Release Notes

🚀 Features

• Flatten the walltime options in the yaml by @GuillaumeLagrange in #211
• Add go-runner-version CLI argument by @not-matthias in #213
• Add allow_empty in upload metadata by @fargito in #208
• No longer warn on missing results by @fargito
• Clean-up the build script by @GuillaumeLagrange
• Bail when used with a statically linked binary by @GuillaumeLagrange
• Embed the preload library in the binary by @GuillaumeLagrange
• Add a codspeed_preload library for valgrind instrumentation by @GuillaumeLagrange
• Print command under test before running it by @GuillaumeLagrange
• Skip upload if --allow-empty is set and no results were produced by @fargito in #205

🐛 Bug Fixes

• Follow frames until we find a non inlined functions in debug info by @GuillaumeLagrange in #202

🏗️ Refactor

• Move the preload_file management to its own module by @GuillaumeLagrange

⚙️ Internals

• Bump exec-harness version
• Remove the "Fetching the results" log group by @GuillaumeLagrange
• Make logs text only by @GuillaumeLagrange
• Make the runner less verbose in info logs by @GuillaumeLagrange
• Revamp readme by @art049 in #178
• Replace CodSpeedHQ/runner with CodSpeedHQ/codspeed by @art049 in #210
• Build exec-harness in gnu for release by @GuillaumeLagrange in #209
• Change arm runner by @GuillaumeLagrange
• Move back the received command log to trace by @GuillaumeLagrange

Install codspeed-runner 4.9.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/v4.9.0/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.9.0

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

exec-harness-v1.1.0

Install exec-harness 1.1.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/codspeed/releases/download/exec-harness-v1.1.0/exec-harness-installer.sh | sh

Download exec-harness 1.1.0

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

4.8.2 - 2026-01-21

Release Notes

🐛 Bug Fixes

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

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

4.8.1 - 2026-01-21

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

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

4.8.0 - 2026-01-20

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

• 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

memtrack-v1.2.0

Install memtrack 1.2.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/memtrack-v1.2.0/memtrack-installer.sh | sh

Download memtrack 1.2.0

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

4.7.0 - 2026-01-12

Release Notes

🚀 Features

• Add l2d cache events to perf command by @GuillaumeLagrange in #188

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

4.6.0 - 2026-01-07

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

🐛 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 4.6.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/v4.6.0/codspeed-runner-installer.sh | sh

Download codspeed-runner 4.6.0

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

memtrack-v1.1.0

Install memtrack 1.1.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/CodSpeedHQ/runner/releases/download/memtrack-v1.1.0/memtrack-installer.sh | sh

Download memtrack 1.1.0

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

4.5.2 - 2025-12-23

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

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