Bun v1.3.13 ships a large set of new features and fixes. Key additions include `bun test --isolate` and `--parallel` for faster test suites with per-file isolation, `--shard` for splitting tests across CI jobs, and `--changed` to run only tests affected by git changes. `bun install` now streams tarballs to disk using 17x less memory. Source maps are rearchitected to use 8x less memory. gzip compression is up to 5.5x faster via zlib-ng. `Bun.serve()` gains Range request support for file-backed responses. SHA3 hash algorithms are added to WebCrypto and node:crypto. WebSocket clients now support ws+unix:// and wss+unix:// schemes. The JavaScriptCore engine is upgraded with 1,316 upstream commits. Dozens of Node.js compatibility fixes, crash fixes, and memory leak patches are also included.
