Bun v1.3.12 ships with a large set of new features and bugfixes. Highlights include native headless browser automation via Bun.WebView (WebKit and Chrome backends), terminal Markdown rendering with `bun ./file.md`, an in-process Bun.cron() scheduler, async stack traces for native errors, 2.3x faster URLPattern, 2x faster Bun.Glob.scan, cgroup-aware parallelism on Linux, TCP_DEFER_ACCEPT for Bun.serve(), HTTPS proxy CONNECT tunnel reuse, SIMD-optimized ANSI string utilities, upgraded JavaScriptCore engine with explicit resource management support, and over 120 bug fixes covering Node.js compatibility, memory leaks, crashes, and security issues.
Table of contents
Bun.WebView — Headless Browser AutomationRender Markdown in the Terminal with bun ./file.mdAsync stack traces for native errorsIn-process Bun.cron() schedulerUDP Socket: ICMP Error Handling and Truncation DetectionUnix Domain Socket Lifecycle Now Matches Node.jsUpgraded JavaScriptCore EngineImproved standalone executables on LinuxURLPattern is up to 2.3x fasterFaster Bun.stripANSI and Bun.stringWidthFaster bun build on low-core machinesFaster Bun.Glob.scan()Cgroup-aware availableParallelism / hardwareConcurrency on LinuxKeep-Alive for HTTPS Proxy CONNECT TunnelsTCP_DEFER_ACCEPT for Bun.serve() on LinuxBugfixes2 Comments
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