Menu drawing performance on laptop? (version 4.3)

I've discovered a strange behavior in version 4.3 when I run it on my laptop (1,6Ghz, 768MB).
When the power is plugged in all is working as it should, but when I run on batteries it takes 'forever' to draw a menu (25s or more depending on the size of the menu). I can actually see line for line for the dropshadow behind the menu beeing drawn. (Top-down or left to right.)
It's the same behaviour for right-click menus as for the top menus.
I have tried to put the computer in high performance mode, so that it shouldn't be slower on batteries, but it didn't help. This is the only program that I have seen behaving like this.
(have not tried verison 4.4 yet)
Has anyone else seen this?
regards
/Markus Stenman
When the power is plugged in all is working as it should, but when I run on batteries it takes 'forever' to draw a menu (25s or more depending on the size of the menu). I can actually see line for line for the dropshadow behind the menu beeing drawn. (Top-down or left to right.)
It's the same behaviour for right-click menus as for the top menus.
I have tried to put the computer in high performance mode, so that it shouldn't be slower on batteries, but it didn't help. This is the only program that I have seen behaving like this.
(have not tried verison 4.4 yet)
Has anyone else seen this?
regards
/Markus Stenman