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- 好きなメソッドは Enumerable#inject
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require 'benchmark' | |
puts "ruby-#{RUBY_VERSION}" | |
Benchmark.bm(10) do |x| | |
array = (10 ** 5).times.to_a | |
x.report 'sum' do |x| | |
array.sum {|i| i * 2 } | |
end |
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kbd = Keyboard.new | |
row1 = 0 | |
row2 = 1 | |
row3 = 2 | |
row4 = 3 | |
row5 = 4 | |
row6 = 5 | |
col1 = 11 | |
col2 = 12 |
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require 'bundler/inline' | |
gemfile do | |
source 'https://rubygems.org' | |
gem 'benchmark-ips' | |
end | |
require 'benchmark/ips' | |
Benchmark.ips do |x| |
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require 'benchmark/ips' | |
Benchmark.ips do |x| | |
x.report("each") do | |
s = 0 | |
(10 ** 5).times.each do |i| | |
s += i | |
end | |
end |
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Warming up -------------------------------------- | |
** 70.304k i/100ms | |
my pow 27.298k i/100ms | |
Calculating ------------------------------------- | |
** 1.633M (± 5.7%) i/s - 8.155M in 5.012777s | |
my pow 345.490k (± 3.6%) i/s - 1.747M in 5.063730s | |
Comparison: | |
**: 1632697.1 i/s | |
my pow: 345489.6 i/s - 4.73x slower |
irb(main):013:0> require 'bigdecimal'
=> false
irb(main):014:0> 10.times.inject(0.0) {|i, _| i + 0.1 }.to_i
=> 0
irb(main):015:0> 10.times.inject(BigDecimal("0.0")) {|i, _| i + BigDecimal("0.1") }.to_i
=> 1
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- https://www.hsbt.org/diary/no_comments.rdf | |
- https://diary.shu-cream.net/atom.xml | |
- https://june29.jp/index.xml |
- 下着 n 日分
- 服 n 日分
- パジャマ
- バスタオル (ありそう)
- タオル (ありそう)
- ハブラシ
- シェーバー
- モバイルバッテリー
- Apple Watch充電するやつ
- 充電器
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console.log("hi"); |
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