Feature #17127: Some TrueClass methods are faster if implemented in Ruby

• Status: Open
• Assignee: -
• Target version: -

[S_H_ (Shun Hiraoka)]

Some TrueClass methods are faster if implemented in Ruby code.

like this.

class TrueClass
  def to_s
    "true".freeze
  end
  alias_method :inspect, :to_s

  def |(bool)
    true
  end
end

benchmark file:

benchmark:
  to_s: |
    true.to_s
  inspect: |
    true.inspect
  or: |
    true | false
loop_count: 1000000

benchmark result:

sh@MyComputer:~/rubydev/build$ make benchmark/trueclass.yml -e COMPARE_RUBY=~/.rbenv/shims/ruby -e BENCH_RUBY=../install/bin/ruby
# Iteration per second (i/s)

|         |compare-ruby|built-ruby|
|:--------|-----------:|---------:|
|to_s     |     66.001M|   91.927M|
|         |           -|     1.39x|
|inspect  |     70.464M|   97.220M|
|         |           -|     1.38x|
|or       |     61.434M|   86.484M|
|         |           -|     1.41x|

COMPARE_RUBY is ruby 2.8.0dev (2020-08-20T04:24:55Z master 6509652c13) [x86_64-linux]. BENCH_RUBY is ahead of ruby 2.8.0dev (2020-08-20T04:24:55Z master 6509652c13) [x86_64-linux].

Probably, inline method cache was able to speed up these methods.

pull request:
https://github.com/ruby/ruby/pull/3435

[S_H_ (Shun Hiraoka)]

• Description updated (diff)

[sawa (Tsuyoshi Sawada)]

• Subject changed from Some TrueClass methods is faster if implemented in Ruby to Some TrueClass methods are faster if implemented in Ruby
• Description updated (diff)

[k0kubun (Takashi Kokubun)]

off topic: If you write an entire ticket in English, I think you should post your ticket to ruby-core to attract more audiences instead of ruby-dev, which has been for tickets written in Japanese.

[S_H_ (Shun Hiraoka)]

k0kubun (Takashi Kokubun) wrote in #note-3:

off topic: If you write an entire ticket in English, I think you should post your ticket to ruby-core to attract more audiences instead of ruby-dev, which has been for tickets written in Japanese.

Thanks!

[S_H_ (Shun Hiraoka)]

these method able to speeding up implemented by Ruby code.

• TrueClass#^
• TrueClass#&

benchmark:

benchmark:
  to_s: |
    true.to_s
  inspect: |
    true.inspect
  or: |
    true | false
  xor: |
    true ^ false
  and: |
    true & false
loop_count: 1000000

result:

sh@MyComputer:~/rubydev/build$ make benchmark/trueclass.yml -e COMPARE_RUBY=~/.rbenv/shims/ruby -e BENCH_RUBY=../install/bin/ruby
# Iteration per second (i/s)

|         |compare-ruby|built-ruby|
|:--------|-----------:|---------:|
|to_s     |     63.991M|   93.655M|
|         |           -|     1.46x|
|inspect  |     83.655M|   96.044M|
|         |           -|     1.15x|
|or       |     38.138M|   77.149M|
|         |           -|     2.02x|
|xor      |     61.388M|   76.603M|
|         |           -|     1.25x|
|and      |     59.928M|   71.783M|
|         |           -|     1.20x|

COMPARE_RUBY is ruby 2.8.0dev (2020-08-26T05:28:05Z master 72cb9bc55f) [x86_64-linux]. BENCH_RUBY is patched ruby.

[S_H_ (Shun Hiraoka)]

recreate PR for merge .rb files

https://github.com/ruby/ruby/pull/3737