Benchmarking if / else with kind_of? against case / in to match two values based on their classes. if / else + kind_of? appears to be 4x faster.

gistfile1.txt

ruby 3.2.4 (2024-04-23 revision af471c0e01) [x86_64-linux]
Warming up --------------------------------------
           if / else   888.000 i/100ms
           case / in   259.000 i/100ms
Calculating -------------------------------------
           if / else      8.856k (± 0.9%) i/s -     44.400k in   5.013974s
           case / in      2.560k (± 3.0%) i/s -     12.950k in   5.064976s

if_else_vs_case_in_benchmark.rb

#!/usr/bin/env ruby

require 'benchmark/ips'

class Foo
end

class Bar
end

value1 = Foo.new
value2 = Bar.new

Benchmark.ips do |b|
  n = 1_000

  b.report('if / else') do
    n.times do
      result = if (value1.kind_of?(Foo) && value2.kind_of?(Bar))
                 true
               else
                 false
               end
    end
  end

  b.report('case / in') do
    n.times do
      result = case [value1, value2]
               in [Foo, Bar]
                 true
               else
                 false
               end
    end
  end
end