Sixeight https://blog.hatena.ne.jp/Sixeight/ ちなみに https://blog.nishimu.land/ ruby require 'benchmark' module Enumerable def amap map {|e| Thread.new { yield e } }.map(&:value) end end ary = [1, 2, 3, 4, 5] res = {} Benchmark.bm(4) do |x| x.report('map') { res[:map] = ary.map {|e| sleep 1; e } } x.report('amap') { res[:amap] = ary.amap {|e| sleep 1; e } } end p [:map, res[:map]] p… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.nishimu.land%2Fentry%2F20081218%2F1229563863" title="非同期ブームに乗って非同期mapを考えてみた - ちなみに" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-12-18 10:31:03 rich https://blog.nishimu.land/entry/20081218/1229563863 1.0 100%