Comparing performance of throw vs raise in Ruby

throwvsraise.rb

# frozen_string_literal: true

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'benchmark-ips'
  gem 'benchmark-memory'
end

require 'benchmark/ips'
require 'benchmark/memory'

Benchmark.ips do |x|
  x.report('throw') do
    catch :failure do
      throw :failure
    end
    true
  end
  x.report('raise') do
    raise StandardError
  rescue StandardError
    true
  end
  x.compare!
end

Benchmark.memory do |x|
  x.report('throw') do
    catch :failure do
      throw :failure
    end
    true
  end
  x.report('raise') do
    raise StandardError
  rescue StandardError
    true
  end
  x.compare!
end

ruby 3.3.1 (2024-04-23 revision c56cd86388) [arm64-darwin23]
Warming up --------------------------------------
throw 460.356k i/100ms
raise 187.610k i/100ms
Calculating -------------------------------------
throw 4.574M (± 7.6%) i/s - 23.018M in 5.065972s
raise 1.772M (±10.2%) i/s - 8.818M in 5.036278s

Comparison:
throw: 4574338.0 i/s
raise: 1771656.7 i/s - 2.58x slower

Calculating -------------------------------------
throw 0.000 memsize ( 0.000 retained)
0.000 objects ( 0.000 retained)
0.000 strings ( 0.000 retained)
raise 680.000 memsize ( 0.000 retained)
2.000 objects ( 0.000 retained)
0.000 strings ( 0.000 retained)

Comparison:
throw: 0 allocated
raise: 680 allocated - Infx more