You fire up a QTimer expecting rock-solid 100ms ticks. Instead, it drifts, drops beats — all because your main thread's EventLoop is choking on queued signals. Here's the bug hunt that nails it.
theAIcatchupApr 09, 20263 min read
⚡ Key Takeaways
QTimer relies on unblocked EventLoops; queued signals from workers can cause massive tick drifts.𝕏
Qt::PreciseTimer helps, but Qt6's QChronoTimer delivers true nanosecond precision.𝕏
Full repro code reveals the bug — fork and profile your own apps now.𝕏
The 60-Second TL;DR
QTimer relies on unblocked EventLoops; queued signals from workers can cause massive tick drifts.
Qt::PreciseTimer helps, but Qt6's QChronoTimer delivers true nanosecond precision.
Full repro code reveals the bug — fork and profile your own apps now.
