On 2019-05-22 18:25, Иван Комиссаров wrote: > What about fast prepend in [QList] Please look at the source and do experiments. Years ago, I think I found that it's just not true. There's a prepend optimisation, yes, but it only kicks in if you _only_ do prepends. If you mix in but a single append, it falls apart. That's IIRC, AFAIR, etc.