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LibUnicode: Avoid expensive path in canonicalize() for ASCII chars

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Ali Mohammad Pur 2026-03-17 17:59:02 +01:00 committed by Andreas Kling
parent 5b07dcbd5d
commit b92e630a59
1 changed files with 6 additions and 0 deletions
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6
Libraries/LibUnicode/CharacterTypes.cpp
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@ -547,6 +547,12 @@ u32 canonicalize(u32 code_point, bool unicode_mode)
// 5. Let u be toUppercase(« cp »), according to the Unicode Default Case Conversion algorithm.
// 6. Let uStr be CodePointsToString(u).
// OPTIMIZATION: For ASCII characters, toUppercase is just to_ascii_uppercase.
// Conditions in 7 & 9 are trivially satisfied (ASCII always maps to a single code point, and the result stays in the same range).
if (code_point < 128)
return to_ascii_uppercase(code_point);
auto code_point_string = String::from_code_point(code_point);
auto uppercased = code_point_string.to_uppercase();
if (uppercased.is_error())