[Development] Important recent changes in QList/QString/QByteArray

Giuseppe D'Angelo giuseppe.dangelo at kdab.com
Wed Sep 2 21:37:49 CEST 2020

On 02/09/2020 21:18, Andrei Golubev wrote:
> Also not sure whether it is an implementation detail or the behavior 
> that should always be anticipated.

People build performance sensitive code assuming the cost of certain 
operations -- like, assuming that erasing elements from a vector never 
reallocates it; and that the only operation that sheds capacity is 
squeeze(), everything else (incl. clear(), incl. resize(0)) keeps the 
capacity (*). We should stop backstabbing them...

(*) Which of course opens an interesting discussion in case of these 
operations detach

Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
KDAB (France) S.A.S., a KDAB Group company
Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com
KDAB - The Qt, C++ and OpenGL Experts

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