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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 /activesupport/test/cache/behaviors | |
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 'activesupport/test/cache/behaviors')
-rw-r--r-- | activesupport/test/cache/behaviors/cache_store_behavior.rb | 2 | ||||
-rw-r--r-- | activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/activesupport/test/cache/behaviors/cache_store_behavior.rb b/activesupport/test/cache/behaviors/cache_store_behavior.rb index e17c09ba39..f7c750c08e 100644 --- a/activesupport/test/cache/behaviors/cache_store_behavior.rb +++ b/activesupport/test/cache/behaviors/cache_store_behavior.rb @@ -319,7 +319,7 @@ module CacheStoreBehavior end def test_original_store_objects_should_not_be_immutable - bar = "bar".dup + bar = +"bar" @cache.write("foo", bar) assert_nothing_raised { bar.gsub!(/.*/, "baz") } end diff --git a/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb b/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb index da16142496..842400f4a3 100644 --- a/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb +++ b/activesupport/test/cache/behaviors/encoded_key_cache_behavior.rb @@ -6,7 +6,7 @@ module EncodedKeyCacheBehavior Encoding.list.each do |encoding| define_method "test_#{encoding.name.underscore}_encoded_values" do - key = "foo".dup.force_encoding(encoding) + key = (+"foo").force_encoding(encoding) assert @cache.write(key, "1", raw: true) assert_equal "1", @cache.read(key) assert_equal "1", @cache.fetch(key) @@ -18,7 +18,7 @@ module EncodedKeyCacheBehavior end def test_common_utf8_values - key = "\xC3\xBCmlaut".dup.force_encoding(Encoding::UTF_8) + key = (+"\xC3\xBCmlaut").force_encoding(Encoding::UTF_8) assert @cache.write(key, "1", raw: true) assert_equal "1", @cache.read(key) assert_equal "1", @cache.fetch(key) @@ -29,7 +29,7 @@ module EncodedKeyCacheBehavior end def test_retains_encoding - key = "\xC3\xBCmlaut".dup.force_encoding(Encoding::UTF_8) + key = (+"\xC3\xBCmlaut").force_encoding(Encoding::UTF_8) assert @cache.write(key, "1", raw: true) assert_equal Encoding::UTF_8, key.encoding end |