add benchmark script

[exterm]

Similar to what @kddnewton did in parser-prism.

I needed an easy way to compare performance of the different parser options. I think it would make sense for it to live in this repo for now.

These are the results from a run on my local machine:

Prism 0.23.0

ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux]
Warming up --------------------------------------
 Parser::CurrentRuby     1.000 i/100ms
       Parser::Prism    13.000 i/100ms
Prism::Translation::Parser
                         2.000 i/100ms
          RubyParser     1.000 i/100ms
Prism::Translation::RubyParser
                         2.000 i/100ms
Calculating -------------------------------------
 Parser::CurrentRuby      8.399 (±11.9%) i/s -     42.000 in   5.028823s
       Parser::Prism    108.428 (±15.7%) i/s -    533.000 in   5.054914s
Prism::Translation::Parser
                         25.832 (± 7.7%) i/s -    130.000 in   5.065884s
          RubyParser      7.040 (± 0.0%) i/s -     36.000 in   5.125236s
Prism::Translation::RubyParser
                         28.607 (± 7.0%) i/s -    144.000 in   5.059851s

Comparison:
       Parser::Prism:      108.4 i/s
Prism::Translation::RubyParser:       28.6 i/s - 3.79x  slower
Prism::Translation::Parser:       25.8 i/s - 4.20x  slower
 Parser::CurrentRuby:        8.4 i/s - 12.91x  slower
          RubyParser:        7.0 i/s - 15.40x  slower

Prism 0.24.0

ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux]
Warming up --------------------------------------
 Parser::CurrentRuby     1.000 i/100ms
       Parser::Prism    25.000 i/100ms
Prism::Translation::Parser
                         2.000 i/100ms
          RubyParser     1.000 i/100ms
Prism::Translation::RubyParser
                         3.000 i/100ms
Calculating -------------------------------------
 Parser::CurrentRuby      7.647 (± 0.0%) i/s -     39.000 in   5.108574s
       Parser::Prism    244.080 (± 4.1%) i/s -      1.225k in   5.026868s
Prism::Translation::Parser
                         25.203 (± 4.0%) i/s -    126.000 in   5.016542s
          RubyParser      7.065 (± 0.0%) i/s -     36.000 in   5.112801s
Prism::Translation::RubyParser
                         29.630 (± 6.8%) i/s -    150.000 in   5.078599s

Comparison:
       Parser::Prism:      244.1 i/s
Prism::Translation::RubyParser:       29.6 i/s - 8.24x  slower
Prism::Translation::Parser:       25.2 i/s - 9.68x  slower
 Parser::CurrentRuby:        7.6 i/s - 31.92x  slower
          RubyParser:        7.1 i/s - 34.55x  slower

[kddnewton]

Thanks @exterm! Would you mind adding it to bin/prism? We've moved all of the individual scripts into there.

[kddnewton]

Just marking as "request changes"

[exterm]

Done and I also added ruby_parser and its translator to the mix.

[kddnewton]

Thanks!

[eregon]

This should be labeled just Prism as there is no Parser::Prism (it confused me for the results in the PR description).
I was about to make a PR but @kddnewton already fixed it in 40059d3 :)

[exterm]

Ah dang, that's copy-pasta. Thanks for the note, Benoit