The Hitchhiker's Guide to All Things Memory in Javascript
summary
Explains how V8 actually lays out memory with six V8 spaces, distinguishes new vs old generation collection, and claims scavenging copies live objects requiring roughly a double-sized copy for scavenging while old objects use mark-and-sweep causing stop the world pauses; demonstrates inspecting allocations with Chrome DevTools Heap profiler and a published interactive DevTools tutorial plus a Heapdump npm snapshot workflow; live demo has flaky network but the tutorial and slides are available and the snapshot workflow works end to end.
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chapters (12)
- 0:00Intro
- 5:32Memory is scarce
- 6:33Memory management overview
- 9:13Data Types
- 10:45Different Spaces
- 12:40Reachability
- 13:41Garbage Collection
- 15:18scavenging
- 17:24Markandsweep
- 20:40Chrome Dev Tools
- 22:13heapdump
- 23:25interactive resource
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