Bug #13773
closed
Improve String#prepend performance if only one argument is given
Added by watson1978 (Shizuo Fujita) over 6 years ago.
Updated over 6 years ago.
Description
This is very similar with https://github.com/ruby/ruby/pull/1634
If only one argument is given, this will prepend the string without
generating temporary object.
String#prepend -> 47.5 % up
Before¶
String#prepend 1.517M (± 1.8%) i/s - 7.614M in 5.019819s
After¶
String#prepend 2.236M (± 3.4%) i/s - 11.234M in 5.029716s
Test code¶
require 'benchmark/ips'
Benchmark.ips do |x|
x.report "String#prepend" do |loop|
loop.times { "!".prepend("hello") }
end
end
Patch¶
https://github.com/ruby/ruby/pull/1670
- Status changed from Open to Closed
Applied in changeset trunk|r60480.
string.c: Improve String#prepend performance if only one argument is given
-
string.c (rb_str_prepend_multi): Prepend the string without generating
temporary String object if only one argument is given.
This is very similar with https://github.com/ruby/ruby/pull/1634
String#prepend -> 47.5 % up
[Fix GH-1670] [ruby-core:82195] [Bug #13773]
-
Before
String#prepend 1.517M (± 1.8%) i/s - 7.614M in 5.019819s
-
After
String#prepend 2.236M (± 3.4%) i/s - 11.234M in 5.029716s
-
Test code
require 'benchmark/ips'
Benchmark.ips do |x|
x.report "String#prepend" do |loop|
loop.times { "!".prepend("hello") }
end
end
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