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Fix periodic latency spikes on Windows with WiFi connections. Closes #…

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sledgehammer999 committed Mar 27, 2016
1 parent c474810 commit c2b6e1ce1aa402b143d0154748c518a87bc6424a
Showing with 15 additions and 0 deletions.
  1. +15 −0 src/app/main.cpp
@@ -215,6 +215,21 @@ int main(int argc, char *argv[])
return EXIT_SUCCESS;
}

#if defined(Q_OS_WIN) && defined(QBT_USES_QT5)
// This affects only Windows apparently and Qt5.
// When QNetworkAccessManager is instantiated it regularly starts polling
// the network interfaces to see what's available and their status.
// This polling creates jitter and high ping with wifi interfaces.
// So here we disable it for lack of better measure.
// It will also spew this message in the console: QObject::startTimer: Timers cannot have negative intervals
// For more info see:
// 1. https://github.com/qbittorrent/qBittorrent/issues/4209
// 2. https://bugreports.qt.io/browse/QTBUG-40332
// 3. https://bugreports.qt.io/browse/QTBUG-46015

qputenv("QT_BEARER_POLL_TIMEOUT", QByteArray::number(-1));
#endif

#ifndef DISABLE_GUI
if (!upgrade()) return EXIT_FAILURE;
#else

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