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authoryuuji.yaginuma <yuuji.yaginuma@gmail.com>2018-05-17 17:32:27 +0900
committeryuuji.yaginuma <yuuji.yaginuma@gmail.com>2018-09-23 08:56:55 +0900
commit1b86d90136efb98c7b331a84ca163587307a49af (patch)
tree8d37adb501fb5b4b3abe8c17ea7383c7de5feb1b /railties/test/isolation
parentd3b952184d8bdb6154aff1f8bc3eda58046026f6 (diff)
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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 'railties/test/isolation')
-rw-r--r--railties/test/isolation/abstract_unit.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index 96d21b3ae2..2a8c6d8f97 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -71,7 +71,7 @@ module TestHelpers
end
def extract_body(response)
- "".dup.tap do |body|
+ (+"").tap do |body|
response[2].each { |chunk| body << chunk }
end
end