Inject performance

inject_performance.rb

require 'benchmark'

n = 100
Benchmark.bm do |x|
  x.report("each") { num=0;[1..n].each{ |i| num+= 1} }
  x.report("inject") { [1..n].inject(0){ |s,i| s+= 1} }
end



n = 1000
Benchmark.bm do |x|
  x.report("each") { num=0;[1..n].each{ |i| num+= 1} }
  x.report("inject") { [1..n].inject(0){ |s,i| s+= 1} }
end



n = 10000000
Benchmark.bm do |x|
  x.report("each") { num=0;[1..n].each{ |i| num+= 1} }
  x.report("inject") { [1..n].inject(0){ |s,i| s+= 1} }
end

n = 1000000000
Benchmark.bm do |x|
  x.report("each") { num=0;[1..n].each{ |i| num+= 1} }
  x.report("inject") { [1..n].inject(0){ |s,i| s+= 1} }
end