readme.md

Using Exceptions to manage control flow in Rails Controllers...

is very very slow

benchmark.rb

require 'benchmark'

def ifelse
  val = rand(1000000) > 1
  if val
    1
  else
    2
  end
end

def raiserescue
  val = rand(1000000) > 1
  begin
    raise unless val
  rescue
    2
  end
end

Benchmark.bm do |x|
  x.report("if/else     ") { 10_000_000.times { ifelse } }
  x.report("raise/rescue") { 10_000_000.times { raiserescue } }
end

results

~ $ ruby benchmark.rb 
      user     system      total        real
if/else       3.810000   0.000000   3.810000 (  3.814801)
raise/rescue  3.940000   0.000000   3.940000 (  3.935940)