David Edmundson authored Jan 20, 2021 and David Redondo committed Jan 27, 2021

This was showing in hotspot as 14ms per update.

It turns out QDir creates a full QFileSystem entry on every file, even
using QDirIterator and with all features turned off.

This isn't really useful when iterating through /sys which has simpler
requirements.

Using a lower level API brings that down to 2ms.


(cherry picked from commit ae21f67c)