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V8 first generates an abstract syntax tree with its own parser.cite-ref-16[16] Then, Ignition generates bytecode from this syntax tree using the internal V8 bytecode format.cite-ref-17[17] TurboFan compiles this bytecode into machine code. In other words, V8 compiles ECMAScript directly to native machine code using just-in-time compilation before executing it.cite-ref-18[18] The compiled code is additionally optimized (and re-optimized) dynamically at runtime, based on heuristics of the code's execution profile. Optimization techniques used include inlining, elision of expensive runtime properties, and inline caching. The garbage collector is a generational incremental collector.cite-ref-19[19]

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