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Optimize String#split

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Optimized `String#split` with `/ /` (single space regexp) as
simple string splitting.  [ruby-core:98272]

|               |compare-ruby|built-ruby|
|:--------------|-----------:|---------:|
|re_space-1     |    432.786k|    1.539M|
|               |           -|     3.56x|
|re_space-10    |     76.231k|  191.547k|
|               |           -|     2.51x|
|re_space-100   |      8.152k|   19.557k|
|               |           -|     2.40x|
|re_space-1000  |     837.405|    2.022k|
|               |           -|     2.41x|

ruby-core:98272: https://bugs.ruby-lang.org/issues/15771#change-85511
This commit is contained in:
Nobuyoshi Nakada 2020-05-12 15:50:15 +09:00
parent 2e7d886311
commit 693f7ab315
Notes: git 2020-05-12 19:59:31 +09:00
2 changed files with 68 additions and 31 deletions
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21
benchmark/string_split.yml
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@ -1,7 +1,18 @@
prelude: |
str0 = [*0..9].join("")
str1 = [*0..5].join(" ") + " "
str10 = str1 * 10
str100 = str10 * 10
str1000 = str100 * 10
benchmark:
to_chars-1: str0.split('')
to_chars-10: (str0 * 10).split('')
to_chars-100: (str0 * 100).split('')
to_chars-1000: (str0 * 1000).split('')
to_chars-1: str1.split('')
to_chars-10: str10.split('')
to_chars-100: str100.split('')
to_chars-1000: str1000.split('')
to_words-1: str1.split(' ')
to_words-10: str10.split(' ')
to_words-100: str100.split(' ')
to_words-1000: str1000.split(' ')
re_space-1: str1.split(/ /)
re_space-10: str10.split(/ /)
re_space-100: str100.split(/ /)
re_space-1000: str1000.split(/ /)