readme.md

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

is very very slow

benchmark.rb

require 'benchmark'

def ifelse
  if true
    1
  else
    2
  end
end

def raiserescue
  begin
    raise
  rescue
    2
  end
end

Benchmark.bm do |x|
  x.report("if/else     ") { 10_000.times { ifelse } }
  x.report("raise/rescue") { 10_000.times { raiserescue } }
end

results

~ $ ruby benchmark.rb 
      user     system      total        real
if/else       0.000000   0.000000   0.000000 (  0.000985)
raise/rescue  0.100000   0.000000   0.100000 (  0.102185)