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| author | Takashi Kokubun <takashikkbn@gmail.com> | 2020-06-26 00:54:05 -0700 |
|---|---|---|
| committer | Takashi Kokubun <takashikkbn@gmail.com> | 2020-06-26 01:33:54 -0700 |
| commit | 200c5f4075cb1d179c2eba5b30b5b0a500870f67 (patch) | |
| tree | 832e498ad09f9aaca07fdef2874385d03de071c9 /NEWS.md | |
| parent | 4949df498a4ca67234c42f00b8e2b513a6a2b6c6 (diff) | |
Add NEWS entries about JIT optimizations
and a related VM improvement.
JIT related commits:
* Code size reduction
* Deduplicate functions on JIT compaction 818d6d33368a396d9cd3d1a34a84015a9e76c5c8
* Avoid always inlining cold paths of ivar fcd257629063a345c48ff2d8057fa8ab910881f2
* Inline only fast path of rb_class_of b16a2aa938d091c387a7437d94dac7f7bb829ba2
* Eliminate a call instruction on deopt 61b14bb32b7e62760225cb2207df5fe87e5339ab
* Cold path partitioning
* Mark method call slow paths as COLDFUNC 0e5a58b6bf6aae72b6290a8d68e0a1b6d9eb4f79
* Mark vm_stackoverflow as NOINLINE COLDFUNC 9d71373c237876038cbac63bb0132907a78288a2
* Create mjit_exec_slowpath and mark it as NOINLINE COLDFUNC 083a17a82ad4c1f80cfb9e84cfb1bff5586470b1
* Primitive.attr! 'inline' / Integer#zero? 7561db8c009bb79a75024fa4ed0350bfb3d0626c
* Kernel#class 946e5cc668f66a4a0b79461047d3fcba8b71eef0
* (more to come...)
* Properly generate opt_send for cfunc cc 7982dc1dfd5df000b7361ccb7bc820da4f3547b8
* Optimize exivar access b736ea63bd4ce4e2fc81dfa73938b39fa70f659c
* Make JIT-ed leave leaf 151f8be40d385ada2ebf7feb84210ed7db7ef4df
* Inline vm_call_cfunc b9d3ceee8f8e4fade1eddc0c18abee59f9c1eee7
VM:
* Enable fastpath on invokesuper 5c2768181382bf84137759efea66f3aaf212665d
* History: https://speakerdeck.com/k0kubun/ruby-3-samituto?slide=40 (in Japanese)
Diffstat (limited to 'NEWS.md')
| -rw-r--r-- | NEWS.md | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -235,6 +235,28 @@ Excluding feature bug fixes. a keyword splat to a method that accepts specific keywords does not allocate a hash. +* `super` is optimized when the same type of method is called in the previous call, + when it's not refinements or an attr reader or writer. + +### JIT + +* Native functions shared by multiple methods are deduplicated on JIT compaction. + +* Decrease code size of hot paths by some optimizations and partitioning cold paths. + +* Not only pure Ruby methods but also some C methods skip pushing a method frame. + + * `Kernel#class`, `Integer#zero?` + +* Always generate appropriate code for `==`, `nil?`, and `!` calls depending on + a receiver class. + +* Optimize instance variable access in some core classes like Hash and their subclasses + +* Eliminate VM register access on a method return + +* Optimize C method call a little + ## Miscellaneous changes * Methods using `ruby2_keywords` will no longer keep empty keyword |