Windows 7, however, should be hardware accelerating GDI, so there shouldn't be an issue in Win7 (of course it should still take longer than 5 seconds). How are you testing Windows 7?
It seemed to me they didnt change anything on gdi draw in win7(it stayed fully software as in vista). All that is accelerated is buffering of windows because of dwm(like in vista) and some form of threaded rendering, but I could be wrong.
On a sidenote, I'm just wondering, do you think mIRC is responsible for any of this behaviour? If not, why file a bug report? It seems quite obvious (at least to me) that this is unlikely an issue with mIRC but rather one with GDI.
Because this could possibly be solved by some workaround in mirc if it's indeed a major windows flaw(some extremely slow codepath maybe? for all I know it could be many things)
