readme.md

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

is very very slow

benchmark.rb

require 'benchmark'

def ifelse
  val = rand(1000) >= 30
  if val
    1
  else
    2
  end
end

def raiserescue3
  val = rand(1000) > 30
  begin
    raise unless val
  rescue
    2
  end
end

def raiserescue1
  val = rand(1000) > 10
  begin
    raise unless val
  rescue
    2
  end
end

def raiserescue01
  val = rand(1000) > 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 3%") { 10_000_000.times { raiserescue3 } }
  x.report("raise/rescue 1%") { 10_000_000.times { raiserescue1 } }
  x.report("raise/rescue 0.1%") { 10_000_000.times { raiserescue01 } }
end

results

       user     system      total        real
if/else       2.720000   0.000000   2.720000 (  2.718175)
raise/rescue 3%  5.340000   0.210000   5.550000 (  5.541438)
raise/rescue 1%  3.620000   0.040000   3.660000 (  3.666966)
raise/rescue 0.1%  2.890000   0.010000   2.900000 (  2.899297)