Mysterious Wifi Latency Spikes Solved: It Was Qt5!
2025-01-02
For eight months, the author battled intermittent 2000ms+ wifi latency spikes, crippling gaming and video calls. New network adapters, OS reinstalls—nothing worked. The culprit? MediBang Paint Pro, using Qt5 (<5.14). Its QNetworkAccessManager incessantly checks for wifi interface changes, causing massive lag. The fix? Setting the environment variable QT_BEARER_POLL_TIMEOUT to -1.
Read more