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MicroJIT (uJIT) MicroJIT (uJIT)
=============== ===============
**DISCLAIMER: Please note that this project is in early stages of development. It is very much a work in progress, it may cause your software to crash, and current performance results are likely to leave you feeling unimpressed.** **DISCLAIMER: Please note that this project is in early stages of development. It is very much a work in progress, it may cause your software to crash, and current performance results are likely to leave you feeling underwhelmed.**
MicroJIT is a lightweight, minimalistic Ruby JIT built inside the CRuby/MRI binary. MicroJIT is a lightweight, minimalistic Ruby JIT built inside the CRuby/MRI binary.
It lazily compiles code using a Basic Block Versioning (BBV) architecture. The target use case is that of servers running It lazily compiles code using a Basic Block Versioning (BBV) architecture. The target use case is that of servers running
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``` ```
chruby ruby-microjit chruby ruby-microjit
ruby <options> ruby myscript.rb
``` ```
You can dump statistics about compilation and execution by running uJIT with the `--ujit-stats` command-line option: You can dump statistics about compilation and execution by running uJIT with the `--ujit-stats` command-line option:
``` ```
./miniruby --ujit-stats <options> ./miniruby --ujit-stats myscript.rb
``` ```
The machine code generated for a given method can be printed by adding `puts UJIT.disasm(method(:method_name))` to a Ruby script. Note that no code will be generated if the method is not compiled.
## Source Code Organization ## Source Code Organization
The uJIT source code is divided between: The uJIT source code is divided between: