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In Ruby 2.3 or later, `String#+@` is available and `+@` is faster than `dup`. ```ruby # frozen_string_literal: true require "bundler/inline" gemfile(true) do source "https://rubygems.org" gem "benchmark-ips" end Benchmark.ips do |x| x.report('+@') { +"" } x.report('dup') { "".dup } x.compare! end ``` ``` $ ruby -v benchmark.rb ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux] Warming up -------------------------------------- +@ 282.289k i/100ms dup 187.638k i/100ms Calculating ------------------------------------- +@ 6.775M (± 3.6%) i/s - 33.875M in 5.006253s dup 3.320M (± 2.2%) i/s - 16.700M in 5.032125s Comparison: +@: 6775299.3 i/s dup: 3320400.7 i/s - 2.04x slower ``` |
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| .. | ||
| tags | ||
| active_model_helper.rb | ||
| asset_tag_helper.rb | ||
| asset_url_helper.rb | ||
| atom_feed_helper.rb | ||
| cache_helper.rb | ||
| capture_helper.rb | ||
| controller_helper.rb | ||
| csp_helper.rb | ||
| csrf_helper.rb | ||
| date_helper.rb | ||
| debug_helper.rb | ||
| form_helper.rb | ||
| form_options_helper.rb | ||
| form_tag_helper.rb | ||
| javascript_helper.rb | ||
| number_helper.rb | ||
| output_safety_helper.rb | ||
| rendering_helper.rb | ||
| sanitize_helper.rb | ||
| tag_helper.rb | ||
| tags.rb | ||
| text_helper.rb | ||
| translation_helper.rb | ||
| url_helper.rb | ||