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| -rw-r--r-- | doc/yjit/yjit.md | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/yjit/yjit.md b/doc/yjit/yjit.md index f4c1b312c2..20eda4fb4d 100644 --- a/doc/yjit/yjit.md +++ b/doc/yjit/yjit.md @@ -153,6 +153,9 @@ YJIT supports all command-line options supported by upstream CRuby, but also add - `--yjit-max-versions=N`: maximum number of versions to generate per basic block (default 4) - `--yjit-greedy-versioning`: greedy versioning mode (disabled by default, may increase code size) +Note that there is also an environment variable `RUBY_YJIT_ENABLE` which can be used to enable YJIT. +This can be useful for some deployment scripts where specifying an extra command-line option to Ruby is not practical. + ### Benchmarking We have collected a set of benchmarks and implemented a simple benchmarking harness in the [yjit-bench](https://github.com/Shopify/yjit-bench) repository. This benchmarking harness is designed to disable CPU frequency scaling, set process affinity and disable address space randomization so that the variance between benchmarking runs will be as small as possible. Please kindly note that we are at an early stage in this project. |