CodSpeed

Monitor your performance continuously

[Arthur Pastel @Art049]

"I use it every day and honestly can't live without it. Saves me tons of time."
@hardfist_1, lead of @rspack_dev at ByteDance, on the CodSpeed Wizard.
So proud and excited to build the performance agent for the fastest projects on the planet!

[Arthur Pastel @Art049]

"If you're gonna ship slop, at least make it fast."
Our top sticker at PyCon and there's a reason: code has never been cheaper, reviewers are under pressure and regressions are piling up.
Stop thinking about performance, we'll make your thing faster.

[Arthur Pastel @Art049]

Claude Code can now improve performance and fix regressions.
The CodSpeed plugin just landed on the official marketplace.

Try it out: /𝚙𝚕𝚞𝚐𝚒𝚗 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚌𝚘𝚍𝚜𝚙𝚎𝚎𝚍@𝚌𝚕𝚊𝚞𝚍𝚎-𝚙𝚕𝚞𝚐𝚒𝚗𝚜-𝚘𝚏𝚏𝚒𝚌𝚒𝚊𝚕

[Thomas Chaigneau @chainyo_ai]

@charliermarsh Codspeed is so good for efficient parsers I always set it up now on any rust code

[Thomas Chaigneau @chainyo_ai]

@Kappaemme1926 i pair it with spec driven dev, coderabbit reviews on PR, and a lot of unittests, snapshots tests and codspeed tests and yes it's quite good. I was hesitant but running on it everywhere now

[CodSpeed @codspeedhq]

@samuelcolvin Yes! Make it faster or go to jail

[Charlie Marsh @charliermarsh]

/goal for finding silly one-line optimizations that speed up your parser by 20-30%

[hardfist @hardfist_1]

@charliermarsh /goal and CodSpeed are an excellent combination for micro-optimization work. We’ve seen similar optimization wins in SWC.

[Jiahan Chen @jiahan_c]

Things get wild when @hardfist_1 uses Codex.

He just made SWC parser 20% faster and minifier 10% faster 🤯

[CodSpeed @codspeedhq]

https://t.co/f9DObpGkTR

[CodSpeed @codspeedhq]

Outrun your JVM regressions. CodSpeed now supports Java 🚀
Maven, Gradle, walltime mode. In CI or local.

[CodSpeed @codspeedhq]

We'll be in PyCon US again this year
See you next week in LA ☀️🌴🐍

[PyCon US @pycon]

Thankful for @codspeedhq and their Supporting sponsorship of #PyConUS and @ThePSF! Thank you for continuing to invest in the #Python community.

[CodSpeed @codspeedhq]

Big news. After years of feedback about our logo, we're making a change. Introducing RabbitSpeed. 🐟

[CodSpeed @codspeedhq]

You can now use CodSpeed to optimize your code directly from your Agents. This ships with skills to optimize performance iteratively and also MCP tools enabling context-efficient profiling analysis by agents.

https://t.co/cG1xK52YWK

[CodSpeed @codspeedhq]

New blog post on unexpected variance
https://t.co/6YQTFWFk12

[Arthur Pastel @Art049]

Had a great time on the @pybites Podcast with @bbelderbos talking about what pushed me to build @CodSpeedHQ. From building an ODM for MongoDB to obsessing over software performance.

We cover the genesis of CodSpeed, Python perf, and why catching regressions early changes everything.

https://t.co/sIy7v3e3dJ

[CodSpeed @codspeedhq]

For the last launch of the week, the CLI just dropped 🚀

[Arthur Pastel @Art049]

Today, we're super excited to introduce the CodSpeed CLI!
You can now get all the insights from the codspeed instruments directly from your command line!

[CodSpeed @codspeedhq]

You can now search and filter performance tests across the app 🔎

[Arthur Pastel @Art049]

Launch week, update #4
Search + filtering across all benchmark pages.

GitHub-style queries like:
`is:regression mode:walltime parser` 👇

[CodSpeed @codspeedhq]

New instrument just dropped!

[Arthur Pastel @Art049]

Launch Week II, Day 3: @CodSpeedHQ Memory Instrument 🧠

Memory tracking in CI with:
• peak memory
• total allocations/bytes
• allocation timeline

Flip on `mode: memory` and spot leaks + regressions early!

[CodSpeed @codspeedhq]

Day 2: WallTime granularity improvement! ✨

[Arthur Pastel @Art049]

Launch week, update #2 👋

CodSpeed Walltime now exposes hardware performance counters directly in CI.

You can see why performance changes: CPU cycles, instructions retired (how much actual work the CPU did),
and cache/memory behavior

Available now with macro runners!