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@prcaen
Created March 26, 2013 06:55
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Benchmark ruby loop
require "benchmark"
n = 5000000
Benchmark.bmbm do |x|
x.report("while:") { i = 1; while i < n do; a = "1 and #{i}"; i += 1; end }
x.report("for loop:") { for i in 1..n; a = "1 and #{i}"; end }
x.report("times:") { n.times do |i| ; a = "1 and #{i}"; end }
x.report("upto:") { 1.upto(n) do |i| ; a = "1 and #{i}"; end }
x.report("until:") { i = 1; until i > n do; a = "1 and #{i}"; i += 1; end }
x.report("each:") { (1..n).each do |i|; ; a = "1 and #{i}"; end }
end
## RESULTS
# Rehearsal ----------------------------------------------
# while: 2.020000 0.000000 2.020000 ( 2.024218)
# for loop: 2.280000 0.000000 2.280000 ( 2.279738)
# times: 2.230000 0.000000 2.230000 ( 2.227971)
# upto: 2.200000 0.000000 2.200000 ( 2.206145)
# until: 2.010000 0.000000 2.010000 ( 2.006059)
# each: 2.230000 0.000000 2.230000 ( 2.233922)
# ------------------------------------ total: 12.970000sec
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