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| -rw-r--r-- | NEWS.md | 47 |
1 files changed, 38 insertions, 9 deletions
@@ -630,22 +630,51 @@ Excluding feature bug fixes. ### JIT -* Native functions shared by multiple methods are deduplicated on JIT compaction. +* Performance improvements of JIT-ed code -* Decrease code size of hot paths by some optimizations and partitioning cold paths. + * Microarchitectural optimizations -* Not only pure Ruby methods but also some C methods skip pushing a method frame. + * Native functions shared by multiple methods are deduplicated on JIT compaction. - * `Kernel#class`, `Integer#zero?` + * Decrease code size of hot paths by some optimizations and partitioning cold paths. -* Always generate appropriate code for `==`, `nil?`, and `!` calls depending on - a receiver class. + * Instance variables -* Optimize instance variable access in some core classes like Hash and their subclasses. + * Eliminate some redundant checks. -* Eliminate VM register access on a method return. + * Skip checking a class and a object multiple times in a method when possible. -* Optimize C method calls a little. + * Optimize accesses in some core classes like Hash and their subclasses. + + * Method inlining support for some C methods + + * `Kernel`: `#class`, `#frozen?` + + * `Integer`: `#-@`, `#~`, `#abs`, `#bit_length`, `#even?`, `#integer?`, `#magnitude`, + `#odd?`, `#ord`, `#to_i`, `#to_int`, `#zero?` + + * `Struct`: reader methods for 10th or later members + + * Constant references are inlined. + + * Always generate appropriate code for `==`, `nil?`, and `!` calls depending on + a receiver class. + + * Reduce the number of VM register accesses on branches and method returns. + + * Optimize C method calls a little. + +* Compilation process improvements + + * It does not keep temporary files in /tmp anymore. + + * Throttle GC and compaction of JIT-ed code. + + * Avoid GC-ing JIT-ed code when not necessary. + + * GC-ing JIT-ed code is executed in a background thread. + + * Reduce the number of locks between Ruby and JIT threads. ## Static analysis |