Set/Array union/intersection benchmark

gistfile1.rb

require 'benchmark'
require 'set'

n = 50000
m = 5000
t = 100

r1 = (1..n).step(3)
r2 = (1..m).step(2)
s1 = Set.new(r1)
s2 = Set.new(r2)
a1 = r1.to_a
a2 = r2.to_a

Benchmark.bm(10) do |x|
  GC.start
  x.report('set union') { t.times{s1.union(s2)} }
  GC.start
  x.report('array union') { t.times{a1 | a2} }
  GC.start
  x.report('set int') { t.times{s1.intersection(s2)} }
  GC.start
  x.report('array int') { t.times{a1 & a2} }
end