diff options
| author | Marc Mutz <marc.mutz@kdab.com> | 2021-07-12 08:17:07 +0200 |
|---|---|---|
| committer | Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> | 2021-07-13 20:03:42 +0000 |
| commit | 7283f0ac2ac451fb0a2d6980cde1e6d82a70df49 (patch) | |
| tree | 828b547e5de49c633b764ddb11fadbb85b6653b7 | |
| parent | 513302e4a54aa70735b5dd728db40f67b6b8116c (diff) | |
QDuplicateTracker: reserve() for at least Prealloc elements
We have space for so many elements, so reserve()ing anything less
makes no sense.
Change-Id: I84d692b10a6a491c37661f84aa3fdd9af43d71e5
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
(cherry picked from commit 16db1d21659793909bd1719805d7ff8de6906f88)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
| -rw-r--r-- | src/corelib/tools/qduplicatetracker_p.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/corelib/tools/qduplicatetracker_p.h b/src/corelib/tools/qduplicatetracker_p.h index 47c97100f9..5cfa19e03b 100644 --- a/src/corelib/tools/qduplicatetracker_p.h +++ b/src/corelib/tools/qduplicatetracker_p.h @@ -81,9 +81,10 @@ class QDuplicateTracker { char buffer[bufferSize(Prealloc)]; std::pmr::monotonic_buffer_resource res{buffer, sizeof buffer}; - std::pmr::unordered_set<T, QHasher<T>> set{&res}; + std::pmr::unordered_set<T, QHasher<T>> set{Prealloc, &res}; #else - QSet<T> set; + static QSet<T> makeQSet() { QSet<T> r; r.reserve(Prealloc); return r; } + QSet<T> set = makeQSet(); int setSize = 0; #endif Q_DISABLE_COPY_MOVE(QDuplicateTracker); |