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| author | Gary Linscott <glinscott@gmail.com> | 2013-07-06 01:54:29 -0400 |
|---|---|---|
| committer | Gary Linscott <glinscott@gmail.com> | 2013-07-06 01:54:29 -0400 |
| commit | 52949fbf1876ecd03303006c534a74c5e29bc90d (patch) | |
| tree | c928c856c7740899fb39352c1e632310ef4f3b22 /src/libstd | |
| parent | 58eb70a5e2ce6602e5685f5cc18ab2fe0c327020 (diff) | |
| download | rust-52949fbf1876ecd03303006c534a74c5e29bc90d.tar.gz rust-52949fbf1876ecd03303006c534a74c5e29bc90d.zip | |
Faster check for ascii-space
Since ' ' is by far one of the most common characters, it is worthwhile to put it first, and short-circuit the rest of the function. On the same JSON benchmark, as the json_perf improvement, reading example.json 10 times from https://code.google.com/p/rapidjson/wiki/Performance. Before: 0.16s After: 0.11s
Diffstat (limited to 'src/libstd')
| -rw-r--r-- | src/libstd/char.rs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/libstd/char.rs b/src/libstd/char.rs index 6a9555f4efc..47473c2faba 100644 --- a/src/libstd/char.rs +++ b/src/libstd/char.rs @@ -82,7 +82,8 @@ pub fn is_uppercase(c: char) -> bool { general_category::Lu(c) } /// #[inline] pub fn is_whitespace(c: char) -> bool { - ('\x09' <= c && c <= '\x0d') + c == ' ' + || ('\x09' <= c && c <= '\x0d') || general_category::Zs(c) || general_category::Zl(c) || general_category::Zp(c) |