Jarred Sumner(@jarredsumner):AoT uses Bun’s bundler & parser to parse typescript, tags types to JavaScriptCore via a typecheck bytecode intrinsic, and compiles the bytecode to machine code via B3 (what JSC’s JITs use) This keeps the JavaScriptCore changes well-contained, so that syncing with upstream WebKit isn’t complicated

Jarred Sumner

@jarredsumner

building @bunjavascript at @anthropicai. formerly: @stripe (twice) @thielfellowship. high school dropout. npm i -g bun

加入 May 2014

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Jarred Sumner@jarredsumner

2026.09.29 02:05

AoT uses Bun’s bundler & parser to parse typescript, tags types to JavaScriptCore via a typecheck bytecode intrinsic, and compiles the bytecode to machine code via B3 (what JSC’s JITs use) This keeps the JavaScriptCore changes well-contained, so that syncing with upstream WebKit isn’t complicated