Glossary term
What is memory heap? Meaning for developers
Where objects, arrays and function bodies live. Unstructured, unlike the stack; cleaned by the garbage collector.
Learn it properly · JavaScript CoreLesson 13: JS Engine and V8 ArchitectureParser, interpreter (Ignition), compiler (TurboFan), memory heap and garbage collection — what the engine does between your file and the CPU. Watch a function climb V8's tiers and fall back on a deopt, and step through mark-and-sweep.