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Jotai v2.20: Rework Store Building Blocks for High-Throughput Performance and Sets the Stage for v3

Daniel Curtis — Fri, 24 Jul 2026 06:26:00 GMT

Jotai v2.20.0 has been released, focusing on improved performance for high-throughput scenarios. Key changes involve adjustments to internal building blocks and addressing previous performance regressions. While the API for everyday use remains unchanged, library authors should note some deprecations as the groundwork for Jotai v3 begins.

By Daniel Curtis

Meta Ports React Compiler to Rust for Faster Builds and Tighter Toolchain Integration

Daniel Curtis — Thu, 23 Jul 2026 06:07:00 GMT

Meta's React library has integrated a Rust version of the React Compiler into its main repository, aimed at enhancing build speed and compatibility with the Rust-based JavaScript toolchain. This port, which memoizes components automatically, demonstrates significant performance improvements, boasting up to 50% faster compilation. The public API remains unchanged to facilitate easy upgrades.

By Daniel Curtis

RSPack 2.0: Performance Gains, Leaner Dependencies and ESM Core

Daniel Curtis — Tue, 21 Jul 2026 15:23:00 GMT

Rspack, developed by ByteDance, has released version 2.0, featuring enhanced performance, reduced dependencies, and a focus on modern ECMAScript modules. Key updates include a pure ESM core, improved static analysis, and support for RSC. Performance benchmarks show big improvements in build times. The project has experienced substantial growth, with npm downloads exceeding 5 million weekly.

By Daniel Curtis