A simple interface to the #benchmark method, #bm is generates sequential reports with labels. The parameters have the same meaning as for #benchmark.

require 'benchmark'

n = 50000
Benchmark.bm(7) do |x|
  x.report("for:")   { for i in 1..n; a = "1"; end }
  x.report("times:") { n.times do   ; a = "1"; end }
  x.report("upto:")  { 1.upto(n) do ; a = "1"; end }
end

Generates:

             user     system      total        real
for:     1.050000   0.000000   1.050000 (  0.503462)
times:   1.533333   0.016667   1.550000 (  0.735473)
upto:    1.500000   0.016667   1.516667 (  0.711239)

Source Code

# File benchmark.rb, line 206
def bm(label_width = 0, *labels, &blk) # :yield: report
  benchmark(" "*label_width + CAPTION, label_width, FMTSTR, *labels, &blk)
end