Arthur Pastel
@Art049
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Co-founder @CodSpeedHQ • Building continuous performance optimization tools
New York, NY
Joined March 2009
RT @euro_rust: Want to write faster programs? Start with the backbone of performance: the memory allocator Last year, @Art049 took us deep….
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And this can be used to model the false positive rates depending on the alert threshold
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Here is the variance in benchmarks observed on GitHub Runners. That's a 2.6% average, which means you cannot reliably detect <10% performance regressions.
We ran over 100 Walltime benchmarks on GitHub-hosted runners and compared them to our Macro Runners, and the variance difference is significant. 2.66% vs. 0.56% and that’s the difference between 45% false positives and 0.04%.
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We ran over 100 Walltime benchmarks on GitHub-hosted runners and compared them to our Macro Runners, and the variance difference is significant. 2.66% vs. 0.56% and that’s the difference between 45% false positives and 0.04%.
codspeed.io
Struggling with unreliable benchmarking in CI? Learn how CodSpeed Macro Runners reduce variance and false positives, making continuous performance checks finally practical in your workflow.
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Check out the changelog for more details on all the improvements!.
codspeed.io
Quickly identify performance bottlenecks and their origins with improved span insights, origin-aware coloring modes, and clearer flamegraph navigation.
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We added the function list on the right, along with a new origin color mode to quickly identify library and user functions
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We have added code origin and library identification, allowing us to distinguish your code from libraries and system functions. We also added more information to the span inspector
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Really excited to get those improvements out for the profiling experience with CodSpeed⚡
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RT @thibaud_colas: Why #Python performance matters… Reduce data center footprint, F YEAH! From @adriencaccia @art049 @codspeedhq at #EuroP….
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From CPU-level details to iterator shenanigans, the goal is simple: challenge your intuition and sharpen your performance mindset. Whether you're into low-level crates or high-level services, there should be at least one “wait, what?” moment in there.
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Super excited to share that we're bringing the performance quiz to EuroRust this October 🦀, and this time, it's in Paris 🇫🇷! .We’ll walk through surprising benchmarking puzzles where you’ll have to guess which implementation is faster before we reveal the actual results.
What’s faster in Rust? 🦀 Your instinct says one thing. The benchmark says something else. @Art049 and @adriencaccia are bringing a live Rust performance quiz to #EuroRust25. You don’t want to miss it!. 🧵1/3
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I'll be speaking at @europython in Prague in 2 weeks! .This time for a performance quizz with @adriencaccia.
Join Arthur Pastel (@art049) at EuroPython for "Intuition vs. Reality: Surprising Truths in Python Performance". Talk:
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Announcing the assistant for software performance optimization 🚀. Describe your performance challenge, share your code, and p99 will analyze, instrument, and visualize the results, cutting the traditional setup overhead down to seconds!
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We’re at @pyconit with @adriencaccia .We’ll quizz you on Python performance again tomorrow! See you in room lasagna at 11:45!
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RT @euro_rust: 🦀 @Art049 - The Impact of Memory Allocators on Performance. Memory allocators are often overlooked. But Arthur makes the cas….
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We’re in NYC before going to PyCon later this week! Hit me up if you wanna grab a coffee !.
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We just improved our C++ integration. Now with first-class Bazel support for larger projects!.
codspeed.io
Enhanced C++ integration now includes Bazel build system support.
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