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performance
240 postsHow AI-Assisted Debugging Made jsdom 43% Faster for React Tests
Sentry engineers used AI-assisted debugging to fix three jsdom bottlenecks, making a React Testing Library suite 43% faster without changing any tests.
Why removing an optimization made GitHub's case-folding 15x faster
How GitHub's Blackbird sped up ASCII case-folding 15x by removing an early-exit branch, unlocking full compiler vectorization for memory-speed throughput.
The physics of Docker build caching: three caches, one wave
A measured breakdown of Docker's three build caches — layer chain, mount cache, image store — and when each caching strategy actually helps.
CommitBrief — AI code reviews, right in your terminal
A provider-agnostic, local-first CLI that reviews your staged changes, a historic range, or a whole GitHub pull request. Zero telemetry, no server. Free and open source.
commitbrief.comHow Postgres-Backed Queues Scale to 30K Workflows per Second
DBOS details how SKIP LOCKED, conditional isolation levels, and partial indexes let Postgres queues scale to 30K workflows per second.
Phantom: Faster Network Simulation via Linux Process Co-Option
Phantom runs unmodified apps as Linux processes for network simulation, beating Shadow, NS-3, and gRaIL in large-scale benchmarks.
Why Go Killed Memory Arenas — And What It Means for Its Future
Go shelved its Memory Arenas proposal over ecosystem fragmentation risks, capping its performance ceiling and squeezing its 'good enough' middle ground.
Why Not Rust? A Balanced Look at Its Real Trade-offs
A veteran engineer's balanced critique of Rust covering complexity, slow compiles, immature tooling, and C/C++ integration friction.
Monocoque: A Pure-Rust ZMTP 3.1 (ZeroMQ) Messaging Library
Monocoque is a pure-Rust ZMTP 3.1 ZeroMQ library with io_uring, tokio, and smol backends, beating libzmq on throughput and latency in benchmarks.
monocoque 0.3.0: pure-Rust ZeroMQ over io_uring, tokio, smol
monocoque 0.3.0 brings pure-Rust ZeroMQ (ZMTP 3.1) with a compio 0.19/io_uring upgrade, SO_REUSEPORT, zero-alloc hot path, and CI-enforced performance and security guarantees.
Concurrent JavaScript: A Thread Model for JSC (2017 Revisit)
WebKit's 2017 thought experiment on extending JavaScript's concurrency model beyond SharedArrayBuffer to full heap-wide object sharing.