Select 50.000 small files and press Shift-Supr.
With qSort 11% of cpu
{F5730673}
And times around 300.000 miliseconds in an i5 (model 69)
Select 50.000 small files and press Shift-Supr, cancel and press Shift-Supr again.
With std::sort 3.3% of cpu
{F5730676}
And times around 900 miliseconds in an i5 (model 69)