# Bun bun-v0.1.11 — Release & Upgrade Intelligence
- **Product:** Bun (https://bun.sh)
- **Version:** bun-v0.1.11
- **Released:** Sep 07, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/bun/updates/bun-v0.1.11/

## Executive Summary (TL;DR)
Bun bun-v0.1.11. Source highlight: curl https://bun.sh/install | bash

## New Features
- feat: implement native os module
- Add buffer.indexOf, includes and lastIndexOf
- Add native EventEmitter
- add SlowBuffer
- Add pad back to base64
- Add native BufferList

## Improvements
- Support emit Symbol events in EventEmitter
- update minified url polyfill
- Implement `napi_add_finalizer`  f023b89b732db0aff24445acbbe39c366d13118d
- `"node:module"`'s `createRequire` function wasn't requiring non-napi modules correctly
- **`setTimeout` CPU usage drops by 50%** https://github.com/oven-sh/bun/commit/c1734c6ec5ef709ee4126b3474c7bee0a377a1fa (Before: 90%, After: 33% - still more work to do here)

## Bug Fixes
- fix buffer.copy
- fix buffer.slice(0, 0)
- fix mkdtemp
- Fix Buffer.isEncoding 39dc9899157d082841d79daa2f98dbecaa4efed6
- `NAPI_MODULE_INIT()` wasn't implemented correctly in Bun and that has been fixed
- `import assert` and `import process` did not behave as expected (`assert` wasn't returning a function). This has been fixed