Ruby

Always inline revalidate_setivar_cache

vm_insnhelper.c: Unify populate_cache and fill_ivar_cache

They're the same code.

vm_insnhelper.c: refactor and optimize setivar cache revalidation

By only storing shape offsets in the cache, we're able to still
match two equal objects that happen to be in different heaps, as
well as to validate the object is neither frozen nor complex.

vm_insnhelper.c: share the cache revalidation logic

It's the same code duplicated in 3 places.

[ruby/prism] Optimize ripper visit_token

It was showing up in profiles.

So:

• Don't splat KEYWORDS (also did the same for BINARY_OPERATORS)
• Use start_with? if possible

Overall gives a ~5% speed boost

https://github.com/ruby/prism/commit/d611aa9d11

[ruby/prism] Freeze the parse result for the ripper translator

It's a small, somewhat hacky performance boost. Locations are lazy, by freezing the
result they don't have to be pack/unpacked redundantly.
This gives about a 4% speed boost.

Other changes are to not modify the frozen AST...

[ruby/prism] Optimize ripper bounds

Basically a port of https://github.com/ruby/ruby/commit/c45f781771314a71856c9b348c640ba532f54349 into ruby

It's quite effective at ~97% hit rate for me.
Speeds it up from ~6.77x slower to only 4.07x slower.

For the lexer on_sp it also gives a bit of an improvement:...

Fix typo and improve docs of Exception#exception

[DOC] Add feature 21796 in NEWS.md

Fix coverage support for RubyVM::ISeq.compile

[Bug #22018]

ISeq returned by RubyVM::InstructionSequene.load_iseq weren't
handled by the coverage module.