ConfPad

V8 is complicated. Things change way too fast and it’s really hard to keep track of what’s the fastest way of doing every specific action.But not anymore. Join me, a V8 contributor, on a journey through the compilation pipeline of V8 and understand how it all works under the hood. We’ll take the example of a popular JavaScript builtin method and find that what does and does not trigger de-optimization.By the end of the talk, you will have a fairly decent idea of how builtins are written inside the V8 compilation pipeline, and how to make sure you always take the fast path, no matter what.