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rails--rails/actionview/lib/action_view/renderer
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yuuji.yaginuma 1b86d90136 Enable Performance/UnfreezeString cop 
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

```
2018-09-23 08:56:55 +09:00
..
partial_renderer [ci skip] document collection_caching.rb 2018-09-19 18:03:16 -05:00
abstract_renderer.rb Use frozen string literal in actionview/ 2017-07-24 11:53:43 +03:00
partial_renderer.rb Merge pull request #30647 from droptheplot/render-partials-string-locals 2018-04-27 19:17:36 -04:00
renderer.rb Use frozen string literal in actionview/ 2017-07-24 11:53:43 +03:00
streaming_template_renderer.rb Enable Performance/UnfreezeString cop 2018-09-23 08:56:55 +09:00
template_renderer.rb Use frozen string literal in actionview/ 2017-07-24 11:53:43 +03:00