CodSpeed @codspeed

We handle performance, so you can focus on shipping. codspeed.io New York, NY Joined October 2022

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CodSpeed @codspeed

5 days ago

@kdy1dev Hey, doing that right now. We are happy to support swc.rs with free macro runners minutes: codspeed.io/docs/features/…!

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Arthur Pastel @Art049

4 weeks ago

The @codspeed agent is getting pretty good doing perfomance work. Here x2-3 on @biomejs formatter. github.com/biomejs/biome/…

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CodSpeed @codspeed

4 weeks ago

The optimization agent got started crunching performance with biome! Here is an example optimization achieved fully autonomously. Many more to come!

Biome @biomejs

4 weeks ago

Some of the performance improvements came from @codspeed's new optimizations agent. Clean PRs with some big wins! github.com/biomejs/biome/…

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Rust Bytes 🦀 @rustaceans_rs

a month ago

JUST IN: Rust Foundation Welcomes New Members: CodSpeed, Haevek, Perplexity, and Software Stewardship Lab

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Proud to announce that @codspeed has joined the Rust Foundation as a Silver member! We’re all-in on making Rust (and everything around it) fast and staying that way. Supporting the Project that makes that possible felt like the obvious next step.

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CodSpeed @codspeed

a month ago

👇 codspeed.io

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CodSpeed @codspeed

a month ago

New look. Same obsession. Yes, it should have been a fish. You’ve been right this whole time. Build features. We make them fast.

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CodSpeed @codspeed

a month ago

Measure, measure, measure 🐠

Elon Musk @elonmusk

a month ago

@PatrickToulme Our C/C++ training stack was written by humans. AI is not yet good enough for extremely high performance software (but it will be).

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Samuel Colvin @samuelcolvin

a month ago

Significant `jiter` release, in particular this includes SIMD support for x86, which should give up to 7x performance improvement for parsing long strings. There are also significant improvements for tape reuse, arm64 string SIMD, float parsing and more. jiter is the most used 3rd party JSON library in Python as a dependency of @pydantic validation. it's also used in Pydantic Monty, and in Pydantic Logfire via datafusion-functions-json. Short story: apply strict constraints, provide clear benchmarks for the thing you want to improve, use @codspeed, let fable and astra do their thing. github.com/pydantic/jiter…

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Biome @biomejs

2 months ago

Let's welcome @codspeed and @Cloudflare new Gold and Silver sponsors of the project! 🙌

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CodSpeed @codspeed

3 months ago

CodSpeed v5 is out, now with more accurate cycle estimation and the ability to exclude allocators from the simulated execution ⚡

Arthur Pastel @Art049

3 months ago

CodSpeed v5 is out, with two big changes to how we measure your code. First, cycle estimation. Until now, every instruction was charged the same cost, but a `div` is ~25x more expensive than a `mov` on real hardware. We patched Callgrind to emit per-instruction metadata and

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RustConf @rustconf

3 months ago

🥇 @codspeed: the performance platform that catches regressions before they hit production, autonomously suggesting and validating optimizations across CPU modeling, profiling, heap analysis, and more. Free for open source. Thank you for supporting #rustconf at the Gold Level, CodSpeed! codspeed.io

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Preston Thorpe @PThorpe92

3 months ago

tfw you spend a few hours optimizing and you finally see the @codspeed GH action report

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CodSpeed @codspeed

3 months ago

hello @1Password, we should talk

Schlez @schniz

3 months ago

“op read” (@1Password cli) takes almost 1s to read a secret. Apple’s “security” is sub 100ms. Is there some trick to make 1Password faster (on an M4 Max machine?!) so I can actually use it in scripts? To be honest Apple’s 90ms for a secret retrieval is questionable too.

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CodSpeed @codspeed

3 months ago

New flamegraph feature ✨

Arthur Pastel @Art049

4 months ago

A flame graph that merges all threads is lying to you. That "hot" function might be a GC thread, not the request path. You can now filter flame graphs down to specific processes and threads, or split them to see exactly how the work is distributed in @codspeed Also available

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Arthur Pastel @Art049

4 months ago

Your benchmark moved. You didn't touch the code. A compiler bump, a new system lib, a different CPU flag. Any of it shifts the numbers. CodSpeed now diffs the environment between two runs, so you know when it's the toolchain that changed and not your code. codspeed.io/changelog/2026…

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CodSpeed @codspeed

4 months ago

codspeed.io/docs/ai/mcp

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CodSpeed @codspeed

4 months ago

This is exactly what we had in mind building our MCP server. Your agent gets the same level of details you can get by browsing profiling data and finally have insights on what and how to optimize

Samuel Colvin @samuelcolvin

4 months ago

Performance work with @codspeed's MCP server feels like a cheat. Instead of stumbling round in the dark with a machete, attempting to hack at random patches of code, Fable and I are a sniper - the MCP tells me which code is slow, we figure out how to make it fast. Rinse.