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| author | yuuji.yaginuma <yuuji.yaginuma@gmail.com> | 2018-05-17 17:32:27 +0900 |
|---|---|---|
| committer | yuuji.yaginuma <yuuji.yaginuma@gmail.com> | 2018-09-23 08:56:55 +0900 |
| commit | 1b86d90136efb98c7b331a84ca163587307a49af (patch) | |
| tree | 8d37adb501fb5b4b3abe8c17ea7383c7de5feb1b /actionview/test/template/form_helper | |
| parent | d3b952184d8bdb6154aff1f8bc3eda58046026f6 (diff) | |
| download | rails-1b86d90136efb98c7b331a84ca163587307a49af.tar.gz rails-1b86d90136efb98c7b331a84ca163587307a49af.tar.bz2 rails-1b86d90136efb98c7b331a84ca163587307a49af.zip | |
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
```
Diffstat (limited to 'actionview/test/template/form_helper')
| -rw-r--r-- | actionview/test/template/form_helper/form_with_test.rb | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/actionview/test/template/form_helper/form_with_test.rb b/actionview/test/template/form_helper/form_with_test.rb index c30176349c..876e799d93 100644 --- a/actionview/test/template/form_helper/form_with_test.rb +++ b/actionview/test/template/form_helper/form_with_test.rb @@ -37,7 +37,7 @@ class FormWithActsLikeFormTagTest < FormWithTest method = options[:method] skip_enforcing_utf8 = options.fetch(:skip_enforcing_utf8, false) - "".dup.tap do |txt| + (+"").tap do |txt| unless skip_enforcing_utf8 txt << %{<input name="utf8" type="hidden" value="✓" />} end @@ -53,7 +53,7 @@ class FormWithActsLikeFormTagTest < FormWithTest method = method.to_s == "get" ? "get" : "post" - txt = %{<form accept-charset="UTF-8" action="#{action}"}.dup + txt = +%{<form accept-charset="UTF-8" action="#{action}"} txt << %{ enctype="multipart/form-data"} if enctype txt << %{ data-remote="true"} unless local txt << %{ class="#{html_class}"} if html_class @@ -2325,9 +2325,9 @@ class FormWithActsLikeFormForTest < FormWithTest method = options[:method] if options.fetch(:skip_enforcing_utf8, false) - txt = "".dup + txt = +"" else - txt = %{<input name="utf8" type="hidden" value="✓" />}.dup + txt = +%{<input name="utf8" type="hidden" value="✓" />} end if method && !%w(get post).include?(method.to_s) @@ -2338,7 +2338,7 @@ class FormWithActsLikeFormForTest < FormWithTest end def form_text(action = "/", id = nil, html_class = nil, local = nil, multipart = nil, method = nil) - txt = %{<form accept-charset="UTF-8" action="#{action}"}.dup + txt = +%{<form accept-charset="UTF-8" action="#{action}"} txt << %{ enctype="multipart/form-data"} if multipart txt << %{ data-remote="true"} unless local txt << %{ class="#{html_class}"} if html_class |