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Pawel Urbanek

@pawelurbanek.com
2 followers 7 following 13 posts

Building hotpath.rs. And blogging about Ruby/Rust perf. pawelurbanek.com

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Pawel Urbanek @pawelurbanek.com · 27/08/2026
Reaching 500k downloads! 🤯 And hotpath Diff is just around the corner.
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Pawel Urbanek @pawelurbanek.com · 18/08/2026
hotpath Diff will provide agents with clear performance constraints and help ensure that AI-built applications stay fast.
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Reposted by Pawel Urbanek
EuroRust @eurorust.eu · 17/08/2026
Welcome @pawelurbanek.com as a speaker! 🦀 A Ruby/Rust dev with over 10 years experience, he will be introducing hotpath-rs, a precise Rust profiler that goes beyond traditional sampling. Nanosecond-scale profiling, async bottlenecks & more! ✨ 👉 eurorust.eu/talks/beyond... #rustlang #eurorust26
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Pawel Urbanek @pawelurbanek.com · 05/08/2026
Over 300k downloads! It took hotpath-rs 6 months to reach its first 50k downloads. Just four months later, we've passed 300k, with over 5,000 downloads on some days. Thanks to everyone contributing, reporting bugs, and sharing feedback. More features and releases are coming soon!
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Pawel Urbanek @pawelurbanek.com · 29/07/2026
Find Rust I/O bottlenecks in minutes. New in hotpath-rs: byte-level I/O tracing. Profile reads, writes, flushes, throughput, and latency for any Rust I/O operation - from files and TCP sockets to compression streams and custom AsyncRead/Write implementations. Docs hotpath.rs/io_tracing
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Pawel Urbanek @pawelurbanek.com · 16/12/2025
I kept seeing "how is hotpath different from CPU sampling profilers?" Started writing a short docs note… ended up with a deep dive into Rust CPU-bound code, blocking vs async I/O, and Tokio runtime internals. 👉 Full write-up: hotpath.rs/sampling_com...
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Pawel Urbanek @pawelurbanek.com · 21/08/2025
github.com/pawurb/mevlo... 0.7.0 is live - ChainList integration - public RPCs for over 2k EVM chains - 99% RPC calls cachedability - JSON format - ~4x better perf - cryo -> parquet = 6x smaller cache size - revm simulation bug fixes - —sort and —limit, easily query for outliers
github.com
GitHub - pawurb/mevlog-rs: EVM transactions querying powered by Revm
EVM transactions querying powered by Revm. Contribute to pawurb/mevlog-rs development by creating an account on GitHub.
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Pawel Urbanek @pawelurbanek.com · 17/07/2025
mevlog v0.6.0 github.com/pawurb/mevlo... just dropped, packed with new features 🧵
github.com
GitHub - pawurb/mevlog-rs: EVM transactions querying powered by Revm
EVM transactions querying powered by Revm. Contribute to pawurb/mevlog-rs development by creating an account on GitHub.
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Pawel Urbanek @pawelurbanek.com · 14/01/2025
I like new Rails pawelurbanek.com/rails-8-feat...
pawelurbanek.com
Lessons learned Migrating my SAAS to Rails 8
My side project Abot for Slack, has been around for ~7 years, i.e., since Rails 5.1. It's now yielding passive income while running on an almost complete autopilot. But I'm still keeping its dependenc...
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