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🚀Bun 1.4 Adds 2900 Fixes and Major Performance Gains

Bun's latest release is a game-changer for performance

TL;DR

Bun 1.4 slashes CPU usage by 5x and memory consumption by up to 35%, with faster startup times on Linux and Windows. It also passes 97% of Node.js tests out-of-the-box.

Bun 1.4 is here, bringing over 2,900 bug fixes and a host of performance improvements. The new version slashes idle CPU usage by up to 5x and reduces memory consumption by up to 35%. It starts 50% faster on Linux and 2.5× faster on Windows. If you're building full-stack JavaScript apps, this release is a must-have for anyone looking to optimize their development workflow. With 1.4, Bun now passes 97% of Node.js tests out-of-the-box, making it more compatible than ever before.

Bun 1.4 Adds 2900 Fixes and Major Performance Gains — Bun

Key Points

1

Bun 1.4 adds +1,517 tests from the Node.js test suite, ensuring near-total compatibility.

2

Over 2,900 issues are fixed in Bun 1.4, addressing a wide range of bugs and performance bottlenecks.

3

CPU usage drops by up to 5x for both large apps and small 'hello world' projects with Bun 1.4.

4

Memory usage is reduced by up to 35% on Linux and Windows, making Bun more efficient than ever before.

5

Bun starts 2× faster on Linux and 2.5× faster on Windows, cutting down development time.

Why It Matters

If you're building full-stack JavaScript apps with Next.js or Vite, Bun 1.4's performance gains can significantly reduce your CPU and memory usage. For example, a large long-running application built on Bun saw its production CPU usage drop by 2×. But remember: the benefits only kick in if you switch to Bun 1.4.

bunnodejsperformancefull-stack

Frequently Asked Questions

Why does this matter?

If you're building full-stack JavaScript apps with Next.js or Vite, Bun 1.4's performance gains can significantly reduce your CPU and memory usage. For example, a large long-running application built on Bun saw its production CPU usage drop by 2×. But remember: the benefits only kick in if you switch to Bun 1.4.

What happened?

Bun 1.4 slashes CPU usage by 5x and memory consumption by up to 35%, with faster startup times on Linux and Windows. It also passes 97% of Node.js tests out-of-the-box.

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