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Technical Documentation: SpiderMonkey Garbage Collector in Firefox

By

sebg

7mo ago· 4 min readenNews

Summary

The article provides technical documentation about SpiderMonkey's garbage collector, which is responsible for memory management in Firefox's JavaScript engine. It describes the collector as a hybrid tracing collector with features including precise collection, generational collection, incremental collection, and parallel collection. The documentation explains how the garbage collector allocates and deallocates memory for JavaScript data structures and some internal SpiderMonkey structures, aiming to maximize data collection while minimizing time.

Key quotes

· 5 pulled
The SpiderMonkey garbage collector is responsible for allocating memory representing JavaScript data structures and deallocating them when they are no longer in use.
It aims to collect as much data as possible in as little time as possible.
The garbage collector is a hybrid tracing collector, and has the following features:
The GC is 'precise' in that it knows exactly which words in memory contain pointers and which contain non-pointer data.
As well as JavaScript data it is also used to allocate some internal SpiderMonkey data structures.
Snippet from the RSS feed
The SpiderMonkey garbage collector is responsible for allocating memory representing JavaScript data structures and deallocating them when they are no longer in use. It aims to collect as much data as possible in as little time as possible. As well as Jav

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