Ruby Issue Tracking System

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09:11 AM Ruby Revision 58f5d3a9 (git): wip is this still necessary

eightbitraptor (Matt V-H)

03/09/2026

03:09 PM Ruby Revision 208b173c (git): Look up slot sizes for allocations in a table

Also remove BASE_SLOT_SIZE. eightbitraptor (Matt V-H)

03:09 PM Ruby Revision 5001c193 (git): Compress the size_to_heap_idx table

Index on 8 byte chunks instead of individual bytes. This works because
all pool stot sizes are pointer aligned, so all sizes in an 8 byte range
map to the same heap. eightbitraptor (Matt V-H)

03/04/2026

11:02 AM Ruby Revision 4d7f3ba2 (git): [ruby/mmtk] Cargo format

https://github.com/ruby/mmtk/commit/7889da7c0e eightbitraptor (Matt V-H)

11:02 AM Ruby Revision fa8b6aff (git): [ruby/mmtk] Buffer obj_free candidates.

Previously, every object allocation in rb_gc_impl_new_obj made a
per-object FFI call into Rust (mmtk_add_obj_free_candidate), which
acquired a mutex on one of the WeakProcessor's candidate vecs, pushed a
single element, and released the ... eightbitraptor (Matt V-H)

11:02 AM Ruby Revision 09262009 (git): [ruby/mmtk] Fix Cargo format issues

https://github.com/ruby/mmtk/commit/26ec9f7f89 eightbitraptor (Matt V-H)

11:02 AM Ruby Revision 3ec9bafe (git): [ruby/mmtk] Flush obj_free buffers before shutdown finalizers

shutdown_call_finalizer reads candidates from the Rust-side
WeakProcessor, but the main ractor's C-side buffer may not
have been flushed yet (ractor_cache_free runs later). Flush
all remaining buffers before reading candidates.
https://... eightbitraptor (Matt V-H)

11:02 AM Ruby Revision 45dabe33 (git): [ruby/mmtk] Distribute batch candidates across parallel buckets

Instead of sending all 128 buffered objects to one bucket,
round-robin distribute them across all worker buckets so
parallel obj_free work stays balanced.
https://github.com/ruby/mmtk/commit/e1f926cd21 eightbitraptor (Matt V-H)

03/03/2026

09:00 PM Ruby Revision f46eb48b (git): Expand the Shape heap index mask

I think we have spare bits here, so let's expand them out and see what
happens. This will allow us to have more than 7 size pools in the future eightbitraptor (Matt V-H)

02/25/2026

08:58 PM Ruby Revision ad380f87 (git): Correct timezone type: It's Asia/Tokyo, not Tokyo/Asia

https://timezonedb.com/time-zones/Asia/Tokyo eightbitraptor (Matt V-H)