URxvt getting slower with use - is it xft or nvidia binary driver?

Hi,
I started using URxvt recently and I love it, especially the tabbed add-on. There's just one problem - with intensive use, after an hour or two it gets very slow in refreshing when switching between tabs or just using it. I mean the text redraw takes a while, like half a second, which is annoying when switching between many tabs.
Now I know xft is supposted to be slow and I'm using it, but I have a core 2 duo 2.33GHz CPU so I thought maybe it can handle xft... And it does, just after restart it works just faaaaast. But after an hour or so it's slow, and later it's even slower.
What is also interesting is that sometimes just resizing the window helps, like making it just a tad smaller, or even bigger. But after a couple resizes even that doesn't help.
So, is it xft that's getting slower and slower with use?
I also use the nvidia proprietary driver and I heard that causes problems, so could that be it?
Apart from that, I use kde 4.4. URxvt is 9.07 and nvidia is 195.36.03.
As for disabling xft: I'm currently using Code Envy R font and I love it, so if I can just keep using it without xft (can i?) then that's okay, otherwise I'd like to stick to xft if at all possible....
Does that happen to anybody else? What do you think may be the problem?
Thanks!

Thanks everybody for all the suggestions. I have checked htop, atop and iotop to ensure nothing is eating my resources. The CPU is free, disk is free and most of memory is as well (I have 3gig so it's plenty). I'm not running in daemon mode and the slowing down is mostly visible when switching tabs so maybe that's it.
I'm familiar with tmux, thanks for the suggestion too, but I still can't get used to it's shortcuts. I like urxvt simple shift-left and shift-right to switch tabs. Maybe I can just reconfigure tmux hotkeys... I'll certainly go that way if I fail with getting urxvt to work properly but there's still a couple of things to try.
I'll try the daemon/client mode of urxvt and I'm also currently trying mrxvt with UTF-8 patch from aur, so far it works good but I need to put it to much more use before I can say it's really fast.
I understand urxvt should run fine on my machine, that's why I was really surprised when I noticed the slow downs. I suspected nvidia because they had some issues in the past with anti-aliased fonts, but seems like it was in the past. One thing's for sure - it made konsole really slow in some configurations. So I thought maybe urxvt is affected by that as well, but if it works for other people then I guess it's something else.
Thanks for all the suggestions everybody!
Last edited by kosmiciatakuja (2010-03-28 11:22:18)

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