benchmark_bm

🚀 Using Benchmark.bm for Basic Measurements

Ruby's standard Benchmark module provides the bm method to tabulate real, user, and system times for labeled code blocks. This is ideal for quick comparisons across multiple approaches in a single run. You can optionally specify the column width for labels to keep the output aligned.

require 'benchmark'

n = 500_000
Benchmark.bm(10) do |x|
  x.report('each')    { (1..n).each    { |i| Math.sqrt(i) } }
  x.report('map')     { (1..n).map     { |i| Math.sqrt(i) } }
  x.report('collect') { (1..n).collect { |i| Math.sqrt(i) } }
end