Andy Wingo • 8/7/2025

whippet hacklog: adding freelists to the no-freelist space

The article details an experiment to add size-segregated freelists to an Immix-inspired garbage collector's 'no-freelist' space to mitigate fragmentation from small holes. The author implemented the change but found it may interfere with the evacuation-based defragmentation mechanism, making results inconclusive. The post also discusses heap growth heuristics and performance comparisons with the BDW collector in the context of the Guile Scheme implementation.

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#performance optimization #memory management #Garbage Collection