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| author | Bung <crc32@qq.com> | 2020-12-01 01:24:12 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-11-30 18:24:12 +0100 |
| commit | 5a43a20f53d826e5f5e47ca49aa7423fd9cba21b (patch) | |
| tree | 7b11aeb6f15e0ab48c47dd2277f1434c98b9f468 | |
| parent | 735c06d7f12ee3e4733754f57a1710e9d0dba5d9 (diff) | |
| download | Nim-5a43a20f53d826e5f5e47ca49aa7423fd9cba21b.tar.gz | |
toXXAscii use xor op, saving 30%~50% time (#16193)
* toXXAscii use xor op, saving 30%~50% time * Update lib/pure/strutils.nim Co-authored-by: hlaaftana <10591326+hlaaftana@users.noreply.github.com> * Update lib/pure/strutils.nim Co-authored-by: Andreas Rumpf <rumpf_a@web.de> Co-authored-by: hlaaftana <10591326+hlaaftana@users.noreply.github.com>
| -rw-r--r-- | lib/pure/strutils.nim | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/pure/strutils.nim b/lib/pure/strutils.nim index f0b447de7..8cbc947bf 100644 --- a/lib/pure/strutils.nim +++ b/lib/pure/strutils.nim @@ -209,7 +209,7 @@ proc toLowerAscii*(c: char): char {.noSideEffect, doAssert toLowerAscii('A') == 'a' doAssert toLowerAscii('e') == 'e' if c in {'A'..'Z'}: - result = chr(ord(c) + (ord('a') - ord('A'))) + result = char(uint8(c) xor 0b0010_0000'u8) else: result = c @@ -248,7 +248,7 @@ proc toUpperAscii*(c: char): char {.noSideEffect, doAssert toUpperAscii('a') == 'A' doAssert toUpperAscii('E') == 'E' if c in {'a'..'z'}: - result = chr(ord(c) - (ord('a') - ord('A'))) + result = char(uint8(c) xor 0b0010_0000'u8) else: result = c |