From 1b86d90136efb98c7b331a84ca163587307a49af Mon Sep 17 00:00:00 2001 From: "yuuji.yaginuma" Date: Thu, 17 May 2018 17:32:27 +0900 Subject: Enable `Performance/UnfreezeString` cop MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 ``` --- activestorage/test/models/filename_test.rb | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'activestorage/test/models') diff --git a/activestorage/test/models/filename_test.rb b/activestorage/test/models/filename_test.rb index 88405e41c0..715116309f 100644 --- a/activestorage/test/models/filename_test.rb +++ b/activestorage/test/models/filename_test.rb @@ -30,8 +30,8 @@ class ActiveStorage::FilenameTest < ActiveSupport::TestCase end test "sanitize transcodes to valid UTF-8" do - { "\xF6".dup.force_encoding(Encoding::ISO8859_1) => "ö", - "\xC3".dup.force_encoding(Encoding::ISO8859_1) => "Ã", + { (+"\xF6").force_encoding(Encoding::ISO8859_1) => "ö", + (+"\xC3").force_encoding(Encoding::ISO8859_1) => "Ã", "\xAD" => "�", "\xCF" => "�", "\x00" => "", -- cgit v1.2.3