[Jarred Sumner · Bun · bun.com](<https://bun.com/blog/bun-v1.4.3>)

# Bun v1.4.3

Fixes 166 issues, addressing 122 👍. bun check, a TypeScript type checker built into Bun that is 3x to 6.4x faster than tsc 7, --check for bun run, bun build and bun test, 67–89% less idle CPU, Bun.FetchSession, experimental Bun.ModuleGraph, --disallow-code-generation-from-strings, up to 2.7x faster large node:http responses, a JavaScriptCore upgrade with faster JSON.parse, faster rejected-promise handling, CompressionStream compression levels, If-Range support in Bun.serve, bun install skips tarballs it won't install, lower bun build memory with many entry points, \[hashN\] output names, profile-guided bytecode layout and faster startup for --compile --bytecode, and many bugfixes and Node.js compatibility improvements.

1. [Releases · Bun](<https://curation.space/bun/releases>)