module Benchmark::Compare
Functionality of performaing comparison between reports.
Usage:
Add x.compare!
to perform comparison between reports.
Example:
> Benchmark.ips do |x| x.report('Reduce using tag') { [*1..10].reduce(:+) } x.report('Reduce using to_proc') { [*1..10].reduce(&:+) } x.compare! end Calculating ------------------------------------- Reduce using tag 19216 i/100ms Reduce using to_proc 17437 i/100ms ------------------------------------------------- Reduce using tag 278950.0 (±8.5%) i/s - 1402768 in 5.065112s Reduce using to_proc 247295.4 (±8.0%) i/s - 1238027 in 5.037299s Comparison: Reduce using tag: 278950.0 i/s Reduce using to_proc: 247295.4 i/s - 1.13x slower
Besides regular Calculating report, this will also indicates which one is slower.
Public Instance Methods
compare(*entries)
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Compare between reports, prints out facts of each report: runtime, comparative speed difference. @param entries [Array<Report::Entry>] Reports to compare.
# File lib/benchmark/compare.rb, line 32 def compare(*entries) return if entries.size < 2 sorted = entries.sort_by(&:ips).reverse best = sorted.shift $stdout.puts "\nComparison:" $stdout.printf "%20s: %10.1f i/s\n", best.label, best.ips sorted.each do |report| name = report.label.to_s $stdout.printf "%20s: %10.1f i/s - ", name, report.ips best_low = best.ips - best.ips_sd report_high = report.ips + report.ips_sd overlaps = report_high > best_low if overlaps $stdout.print "same-ish: difference falls within error" else x = (best.ips.to_f / report.ips.to_f) $stdout.printf "%.2fx slower", x end $stdout.puts end $stdout.puts end