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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -98,7 +98,13 @@ with all sufficient information, see the ChangeLog file or Redmine Ruby 2.5 improves block passing performance. [Feature #14045] Additionally, Ruby 2.6 improves the performance of passed block calling. -* `--jit` option to enable JIT compiler is added. [Feature #14235] [experimental] +* Introduce an initial implementation of JIT (Just-in-time) compiler. [Feature #14235] [experimental] + * `--jit` option is added to enable JIT. `--jit-verbose=1` is good for inspection. See `ruby --help` for others. + * This JIT relies on C compiler used to build Ruby, on runtime. Only gcc and clang are supported for the JIT + for now, and MinGW support has some issues. + * As of 2.6.0-preview1, we're just preparing infrastructure for JIT and very few optimizations are implemented. + So it's not ready for benchmarking Ruby's JIT performance yet. It's known that current JIT enablement makes + Rails application slower for now. * VM generator script renewal; makes the generated VM more optimized. [GH-1779] |