admin/mruby-mruby
1
0
Fork 0
mirror of https://github.com/mruby/mruby synced 2026-06-08 16:11:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

Optimize str_subseq with MRB_UTF8_STRING to ASCII only string

Browse Source 
### Benchmark (with `MRB_UTF8_STRING`)

  ```ruby
  # benchmark.rb
  COUNT = 300000
  SIZE = 10000
  s = "a" * SIZE
  s.size  # set `MRB_STR_ASCII` flag
  i = 0
  while i < COUNT
    s[-1]
    i += 1
  end
  ```

#### Before this patch:

  ```
  $ time mruby benchmark.rb
          2.06 real         2.05 user         0.00 sys
  ```

#### After this patch:

  ```
  $ time mruby benchmark.rb
          0.05 real         0.04 user         0.00 sys
  ```
This commit is contained in:
KOBAYASHI Shuji
2019-10-23 19:03:39 +09:00
parent fa85f91e0e
commit 06bd4ffdaf
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/string.c
+1 -1
View File
@@ -603,7 +603,7 @@ str_range_to_bytes(mrb_value str, mrb_int *pos, mrb_int *len)
static inline mrb_value
str_subseq(mrb_state *mrb, mrb_value str, mrb_int beg, mrb_int len)
{
str_range_to_bytes(str, &beg, &len);
if (!RSTR_ASCII_P(mrb_str_ptr(str))) str_range_to_bytes(str, &beg, &len);
return mrb_str_byte_subseq(mrb, str, beg, len);
}
#else