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| author | Alex Trotsenko <alex1973tr@gmail.com> | 2016-09-17 16:43:02 +0300 |
|---|---|---|
| committer | Alex Trotsenko <alex1973tr@gmail.com> | 2017-02-09 18:46:24 +0000 |
| commit | 6e8fcab7e07717526c8ea6eac8785bf27fa090c3 (patch) | |
| tree | a6ea9825b55b3b406515e88462c54b448ff672a6 /src/corelib/io/qiodevice_p.h | |
| parent | 60563855e589cb51b4966ca51a4d390a2f1609a4 (diff) | |
Improve QIODevice::peek() performance on buffered devices
Since 5.7, QIODevice::peek() implementation is based on transaction
mechanism. While technically it's correct, seeking backward on a
buffered random-access device clears the internal buffer that affects
the performance of reading.
To solve the problem, this patch implements peek mode directly inside
the reading procedure.
Task-number: QTBUG-56032
Change-Id: Ic5269f76e44c491a0309e13aba87fa7cf7b9259f
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Diffstat (limited to 'src/corelib/io/qiodevice_p.h')
| -rw-r--r-- | src/corelib/io/qiodevice_p.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/corelib/io/qiodevice_p.h b/src/corelib/io/qiodevice_p.h index 0e424b6831..71a326dd53 100644 --- a/src/corelib/io/qiodevice_p.h +++ b/src/corelib/io/qiodevice_p.h @@ -171,7 +171,7 @@ public: void setReadChannelCount(int count); void setWriteChannelCount(int count); - qint64 read(char *data, qint64 maxSize); + qint64 read(char *data, qint64 maxSize, bool peeking = false); virtual qint64 peek(char *data, qint64 maxSize); virtual QByteArray peek(qint64 maxSize); |