diff options
| author | Anton Kudryavtsev <a.kudryavtsev@netris.ru> | 2016-01-21 22:07:25 +0300 |
|---|---|---|
| committer | Anton Kudryavtsev <a.kudryavtsev@netris.ru> | 2016-01-22 10:18:34 +0000 |
| commit | 0f51686a695bea6151c000aba6397f4402a8d20d (patch) | |
| tree | 07f4341b3653bb4f9c41fb011556f92e48fc6653 /src/corelib/kernel | |
| parent | 720d1792f2c7aff6c810367b5ff33ef041f17f2b (diff) | |
QVariant: use reserve in convert()
... to optimize memory allocation.
Change-Id: I7f644955be779c3651683401a7985a265b69ca6f
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Diffstat (limited to 'src/corelib/kernel')
| -rw-r--r-- | src/corelib/kernel/qvariant.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/corelib/kernel/qvariant.cpp b/src/corelib/kernel/qvariant.cpp index 2db4e07c99..c7d9c9767a 100644 --- a/src/corelib/kernel/qvariant.cpp +++ b/src/corelib/kernel/qvariant.cpp @@ -560,7 +560,9 @@ static bool convert(const QVariant::Private *d, int t, void *result, bool *ok) if (d->type == QVariant::List) { QStringList *slst = static_cast<QStringList *>(result); const QVariantList *list = v_cast<QVariantList >(d); - for (int i = 0; i < list->size(); ++i) + const int size = list->size(); + slst->reserve(size); + for (int i = 0; i < size; ++i) slst->append(list->at(i).toString()); } else if (d->type == QVariant::String) { QStringList *slst = static_cast<QStringList *>(result); @@ -826,7 +828,9 @@ static bool convert(const QVariant::Private *d, int t, void *result, bool *ok) if (d->type == QVariant::StringList) { QVariantList *lst = static_cast<QVariantList *>(result); const QStringList *slist = v_cast<QStringList>(d); - for (int i = 0; i < slist->size(); ++i) + const int size = slist->size(); + lst->reserve(size); + for (int i = 0; i < size; ++i) lst->append(QVariant(slist->at(i))); } else if (qstrcmp(QMetaType::typeName(d->type), "QList<QVariant>") == 0) { *static_cast<QVariantList *>(result) = |