Emulator

What steps will reproduce the problem?
1.Start a game without native resolution ticked
2.Start the game again, with native resolution ticked

What is the expected output? What do you see instead?
When you start the game in a custom resolution, speed is only half of what
you get in native resolution. Before you got the same speed no matter what
resolution you chose.

What version of the product are you using? On what operating system?
r4046 & r4061. Problem was not in r3986.
Specs: Core2Duo E8400 3,0 Ghz;
4Gb RAM; NVIDIA GeForce GTX 260;
WinVista 32-Bit

Please provide any additional information below.
Tested with error: SSBB, Super Mario Sunshine, Mario Kart Wii (MKWii gave
only 1 FPS in menu without native resolution, 10-20 with)