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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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| .. | ||
| helpers | ||
| locale | ||
| renderer | ||
| tasks | ||
| template | ||
| testing | ||
| base.rb | ||
| buffers.rb | ||
| context.rb | ||
| dependency_tracker.rb | ||
| digestor.rb | ||
| flows.rb | ||
| gem_version.rb | ||
| helpers.rb | ||
| layouts.rb | ||
| log_subscriber.rb | ||
| lookup_context.rb | ||
| model_naming.rb | ||
| path_set.rb | ||
| railtie.rb | ||
| record_identifier.rb | ||
| rendering.rb | ||
| routing_url_for.rb | ||
| template.rb | ||
| test_case.rb | ||
| version.rb | ||
| view_paths.rb | ||