A lot of people have hinted at QObject being heavy, but without any clarity on how heavy is it exactly. So I did some measurements, not very accurate, all values are approximate.
- unused QObject ~160 bytes
- single auto connection w/o arguments ~235 bytes
- 2 auto connections w/o arguments ~315 bytes
- 3 auto connections, 1 with 3 arguments ~400 bytes
- 2 auto connections, 1 queued with 3 arguments ~432 bytes
Those numbers should take into account I am using a 64 bit Qt build.
So, in conclusion, the overhead of QObject is quite significant indeed. Nothing to sneeze at or overuse.
