Details
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Type:
Task
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Status: Closed
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Priority:
P3: Somewhat important
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Resolution: Done
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Affects Version/s: 6.0.0
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Fix Version/s: 6.3
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Component/s: Core: Locales (i18n), Core: QString and Unicode
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Labels:None
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Platform/s:
All
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Technical Risk:Normal
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Commits:2696d5a71b16e4288f4b071f9291cec7f719455a
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Story Points:13
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Sprint:Qt6_Foundation_Sprint 38, Qt6_Foundation_Sprint 39, Qt6_Foundation_Sprint 40
Description
At present, QString's number-formatting code is delegated to QLocale machinery that's slowed down by taking locale-awareness into account, which makes it significantly more complex than the C-locale processing that QString is actually exercising.
Implementing a separate code-path optimised for the C locale, for use by QString (and QLocale::c()) could deliver a significant performance improvement.
Attachments
Issue Links
- relates to
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QTBUG-87330 QList - double performance drop
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- Closed
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| For Gerrit Dashboard: QTBUG-88484 | ||||||
|---|---|---|---|---|---|---|
| # | Subject | Branch | Project | Status | CR | V |
| 361154,8 | Add benchmarks for QString::number | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 361155,12 | QString::number(int): Avoid going through qlocale machinery | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 361175,10 | WIP: QString::number(double): avoid QLocale machinery | dev | qt/qtbase | Status: DEFERRED | -2 | 0 |
| 361494,28 | QString::number(double): Disentangle from the QLocale path | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 361963,9 | QString: extend number(double) formatting test | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 362328,8 | QByteArray::number(double): Extend the test | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 362619,13 | Make double-formatting code ready for QByteArray | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 362620,14 | QByteArray: Disentangle number(double) from QLocale | dev | qt/qtbase | Status: MERGED | +2 | 0 |
| 364131,6 | QString/QByteArray::number(double): Test big numbers | dev | qt/qtbase | Status: MERGED | +2 | 0 |
