Bun v0.1.9

To upgrade: ```bash bun upgrade ``` To install: ```bash curl https://bun.sh/install | bash ``` <details> <summary>If you have any problems upgrading</summary> Run the install script (you can run it multiple times): ```bash curl https://bun.sh/install | bash ``` </details> ## What's new - Numerous crashes fixed by @zhuzilin!! Incredible work. - [Linux] Improved event loop reliability and reduced CPU usage for concurrent/async IO (affects `bun install` and `fetch()` mostly) - `Bun.serve` gets about 20% faster outside of "hello world" benchmarks due to optimizing how `Headers` are copied/read and faster generated bindings - `require("buffer")` and `require("process")` now point to Bun's implementation instead of a browserify polyfill (thanks @zhuzilin) - Fixed a bug that would cause `setTimeout` or `setInterval` to not keep the process alive (thanks @zhuzilin) - Updated to latest WebKit - 6x - 10x faster `ptr()` in `bun:ffi` JIT-optimized `TextEncoder.encodeInto` can be a 1.5x perf boost up to around a 5x perf boost <img width="536" alt="image" src="https://user-images.githubusercontent.com/709451/185333824-26c37ce4-dd29-4a2a-938e-182771eb8ce8.png"> The `hash()` function in this microbenchmark calls `ptr()`: <img width="597" alt="image" src="https://user-images.githubusercontent.com/709451/185334865-e5451f5a-6214-4c83-b401-1247f3ef9ae1.png"> ## Internals #### Bun learns how to JIT `DOMJIT` is a JavaScriptCore API that gives 3rd-party embedders low-level access to the JIT compiler/assembler to optimize native functions and getters/setters. Safari leverages DOMJIT to make commonly-accessed properties like `element.parentNode` faster Bun is beginning to use DOMJIT now, starting in two places: - `ptr()` function in `bun:ffi` - [`TextEncoder.encodeInto`](https://developer.mozilla.org/en-US/docs/Web/API/TextEncoder/encodeInto) To better support Bun's usecase, I extended `DOMJIT` to support Typed Array arguments, as well as added support for specifying more kinds of side effects that enable/disable optimizations: - https://github.com/oven-sh/WebKit/commit/d2ef2fd828761778a3b04289563946354a457e29 - https://github.com/oven-sh/WebKit/commit/3262da8fd77667aaf95e75c7efa501dc135bc0ac - https://github.com/oven-sh/WebKit/commit/4ac5b04047a53ce2363495a79770a2ae6d67761b#diff-90a5d15b3faae39b6e5075902ae5fd2e0b7f7f40bb0590f3e298e7715db048e5 #### Faster and more reliable JSC <> Zig bindings At Bun's compile-time, Bun now code-generates C++ binding classes for JavaScript objects implemented in Zig. Previously, Bun mostly used the JavaScriptCore C API. Using JavaScriptCore's C++ API improves performance and is important for making the garbage collector better aware of Bun's usage. But, writing bindings manually can be very repetitive. Given a class definition in JavaScript [like this](https://github.com/oven-sh/bun/blob/eb5b298bc17a7ea2ede438b227c27c3fc0b5462e/src/bun.js/webcore/response.classes.ts#L60-L65): ```ts define({ name: "Response", construct: true, finalize: true, JSType: "0b11101110", klass: { json: { fn: "constructJSON", }, // rest of the code }, proto: { url: { getter: "getURL", cache: true, }, text: { fn: "getText" }, json: { fn: "getJSON" }, arrayBuffer: { fn: "getArrayBuffer" }, blob: { fn: "getBlob" }, clone: { fn: "doClone", length: 1 }, // rest of the code }, }) ``` Bun generates corresponding: - [C++ classes](https://github.com/oven-sh/bun/blob/eb5b298bc17a7ea2ede438b227c27c3fc0b5462e/src/bun.js/bindings/ZigGeneratedClasses.cpp#L2465-L2872) - [Zig bindings](https://github.com/oven-sh/bun/blob/eb5b298bc17a7ea2ede438b227c27c3fc0b5462e/src/bun.js/bindings/generated_classes.zig#L826-L937) with type checks that verify the expected ABI matches This approach is inspired by [WebIDL bindings](https://www.chromium.org/developers/web-idl-interfaces/) which both Safari and Chromium use. #### More reliable event loop on Linux This screenshot is with a simulated bandwidth limit and no throttling of max http connections Previously, bun had a tendency to hang in situations like this  ## What's Changed * fix MD5 length and compile error by @zhuzilin in https://github.com/oven-sh/bun/pull/1050 * fix appendFile permission by @zhuzilin in https://github.com/oven-sh/bun/pull/1052 * Invalidate column name caches when the schema of table may change by @zhuzilin in https://github.com/oven-sh/bun/pull/1056 * refactor(src/tagged_pointer): `IntPrimtiive` -> `IntPrimitive` by @ryanrussell in https://github.com/oven-sh/bun/pull/1046 * Remove column name caches in js by @zhuzilin in https://github.com/oven-sh/bun/pull/1057 * [bun error] fix typo in markdown.ts by @eltociear in https://github.com/oven-sh/bun/pull/995 * [WIP] Native buffer module by @zhuzilin in https://github.com/oven-sh/bun/pull/1067 * Improve event loop reliability on Linux by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/1066 * Add synthetic buffer module by @zhuzilin in https://github.com/oven-sh/bun/pull/1076 * Deps - Update libarchive by @jonacollazo in https://github.com/oven-sh/bun/pull/1078 * Fix active_task count for timeout tasks by @zhuzilin in https://github.com/oven-sh/bun/pull/1081 * Fix server segfault by making controller not early GC'ed by @zhuzilin in https://github.com/oven-sh/bun/pull/1090 * Add native process module by @zhuzilin in https://github.com/oven-sh/bun/pull/1095 ## New Contributors * @jonacollazo made their first contribution in https://github.com/oven-sh/bun/pull/1078 **Full Changelog**: https://github.com/oven-sh/bun/compare/bun-v0.1.8...bun-v0.1.9