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QRegExp is extremely ineffecient when capturing everything at the start, but not matching the end of the expression (e.g. 200+ms when parsing for signature change message in the relatively long xcodebuild compile output line). QRegularExpression is much faster with the same expression (40ms with the same example), but just checking for "endsWith" and getting the first part of the line manually is the fastest. Change-Id: Id5f0378e38f0edeba24036c6e9519c8107e4a361 Task-number: QTCREATORBUG-15613 Reviewed-by: Vikas Pachdha <vikas.pachdha@theqtcompany.com> Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
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