Static Roots: Objects with Compile-Time Constant Addresses · V8

JavaScript objects like 'undefined' and 'true' are immovable immutable roots in V8 that have compile-time constant addresses. V8's static roots feature allows for quick access to these objects by guessing their memory addresses at compile time. The read-only heap containing these objects is created at compile time and loaded into memory when starting V8. Address prediction is made possible through pointer compression and deterministic creation of a bit identical read-only heap.