diff options
| author | Kent Hansen <kent.hansen@nokia.com> | 2011-09-14 13:50:36 +0200 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2011-09-15 20:39:28 +0200 |
| commit | 08d1ca10537b2005fa0ff93534272e277b3ae821 (patch) | |
| tree | 76ec1088be51f25d33fc9c876dd245b332d2fc86 /src/corelib/tools/qchar.h | |
| parent | a48e9af146ee1d7571934994065e7164fd323f18 (diff) | |
Boost performance of QChar::isLetterOrNumber
Make it inline; add fast checks for ascii letters
and digits; add fallback function that uses the
fastcall calling convention.
On ia32, this change makes isLetterOrNumber ~120x
faster for ascii letters and digits, ~150x faster
for non-letter/digit ascii characters, and ~1.3x
faster for non-ascii characters.
Note that this change is NOT binary compatible.
Also add an autotest with expected results from
before the optimization, to ensure that the
behavior is the same.
Change-Id: Ia4e13692f4dd79f6aa0b96da29449e0487971b0e
Reviewed-on: http://codereview.qt-project.org/4904
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Diffstat (limited to 'src/corelib/tools/qchar.h')
| -rw-r--r-- | src/corelib/tools/qchar.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/corelib/tools/qchar.h b/src/corelib/tools/qchar.h index fc5a9b051d..36e185ebce 100644 --- a/src/corelib/tools/qchar.h +++ b/src/corelib/tools/qchar.h @@ -240,7 +240,13 @@ public: || (ucs > 127 && isLetter(ucs)); } bool isNumber() const; - bool isLetterOrNumber() const; + inline bool isLetterOrNumber() const + { + return (ucs >= 'a' && ucs <= 'z') + || (ucs <= 'Z' && ucs >= 'A') + || (ucs <= '9' && ucs >= '0') + || (ucs > 127 && isLetterOrNumber(ucs)); + } inline bool isDigit() const { return (ucs <= '9' && ucs >= '0') || (ucs > 127 && isDigit(ucs)); } bool isSymbol() const; @@ -322,6 +328,7 @@ public: private: static bool QT_FASTCALL isDigit(ushort ucs2); static bool QT_FASTCALL isLetter(ushort ucs2); + static bool QT_FASTCALL isLetterOrNumber(ushort ucs2); #ifdef QT_NO_CAST_FROM_ASCII QChar(char c); |