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Watching Go’s new garbage collector move through the heap - The Consensus

theconsensus.devSaved July 28, 202625 minJuly 19, 2026

Phil Eaton · via The Consensus

Summary

Go 1.26 made Green Tea the default GC, following its introduction in 1.25.

The post visualizes Go's size-segregated heap layout and confirms the non-moving collector leaves object addresses unchanged post-collection. It also documents a known limitation: Go's non-moving GC cannot reclaim sparse pages with isolated 8KiB object allocations.

Topics

Go Garbage Collector Memory Allocation Go Runtime Heap Visualization Performance Profiling

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William's Bookmark Library

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Watching Go’s new garbage collector move through the heap - The Consensus

theconsensus.devSaved July 28, 202625 minJuly 19, 2026

Phil Eaton · via The Consensus

Summary

Go 1.26 made Green Tea the default GC, following its introduction in 1.25.

The post visualizes Go's size-segregated heap layout and confirms the non-moving collector leaves object addresses unchanged post-collection. It also documents a known limitation: Go's non-moving GC cannot reclaim sparse pages with isolated 8KiB object allocations.

Topics

Go Garbage Collector Memory Allocation Go Runtime Heap Visualization Performance Profiling

Visit Site All Bookmarks

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Watching Go’s new garbage collector move through the heap - The Consensus

Summary

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Watching Go’s new garbage collector move through the heap - The Consensus

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