John Hawthorn

Allow Method objects to be Ractor shareable

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This is built on top of https://github.com/ruby/ruby/pull/12977 (itself just a rebase of https://github.com/ruby/ruby/pull/7182). The last commit, bbad06701c0f86b9a678c3959816792ef717a576, has the noteable change. This makes Method objects shareable via `Ractor.make_shareable`, with similar...

Accurate GC.stat under multi-Ractor mode

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This commit flushes the `allocated_objects_count` from the current Ractor's rb_ractor_newobj_cache_t whenever GC.stat or GC.stat_heap is called. This should allow measuring a small number of allocations as expected even after starting...

PoC: Add option to use musttail in interpreter loop

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This adds a compile-time option, `OPT_TAILCALL_THREADED_CODE`, to use musttail for threading in the VM loop. This works best with the latest LLVM, though the latest GCC also has musttail. This...

Avoid adding garbage objects to id2ref table

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We didn't confirm that this is causing the CI failures, but this is our guess. The id2ref table is built calling `disable_gc_no_rest`, which won't finish on ongoing GC, so it...

YJIT: call alloc func directly in new

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This removes an indirect branch by calling the allocator function from the class directly. ``` Benchmark 1: ./miniruby_master --yjit -e '20_000_000.times { Object.new }' Time (mean ± σ): 1.203 s...