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# ruby/benchmark
This directory has benchmark definitions to be run with
[benchmark\_driver.gem](https://github.com/benchmark-driver/benchmark-driver).
## Normal usage
Execute `gem install benchmark-driver` and run a command like:
```console
# Run a benchmark script with the ruby in the $PATH
benchmark-driver benchmark/erb_render.yml
# Run all benchmark scripts with multiple Ruby executables or options
benchmark-driver benchmark/*.yml -e /path/to/ruby -e '/path/to/ruby,--jit'
# Or compare Ruby versions managed by rbenv
benchmark-driver benchmark/*.yml --rbenv '2.5.1;2.6.0-preview2,--jit'
```
## make benchmark
Using `make benchmark`, `make update-benchmark-driver` automatically downloads
the supported version of benchmark-driver, and it runs benchmarks with the downloaded
benchmark-driver.
```console
# Run all benchmarks with the ruby in the $PATH and the built ruby
make benchmark
# Or compare with specific ruby binary
make benchmark COMPARE_RUBY="/path/to/ruby --jit"
# You can specify any option via $OPTS
make benchmark OPTS="--help"
```
## make benchmark-each
`make benchmark-each` is similar to `make benchmark`, but it allows to execute
some specific benchmarks.
```console
# Run vm1 benchmarks
make benchmark-each ITEM=vm1
# Match erb but exclude app_erb to run only erb_render
make benchmark-each ITEM=erb OPTS="--exclude=app_erb"
```
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