Version: unspecified (using KDE 4.6.2) OS: Linux A medium(606 lines) to long file scroll is very slow and jerky in Vim. The cpu utilization is also quite high. General scroll speed in a console application in Konsole is slow. The expected behavior should be similar to xterm. Vim scroll speed in xterm is very nice and its a pleasure to program in it. Reproducible: Always Steps to Reproduce: Open a file which has ~1000 lines. Scroll up and down to notice the behavior. You can check the CPU utilization jump abnormally when scrolling. Actual Results: The scroll is jerky and slow. Expected Results: The scroll should be smooth similar to the behavior of xterm.
I setup xterm to show truetype fonts and it too was terrible with vim scroll :(. What can be done to optimize this?
What font are you using? If you are not using the standard system 'monospace' font, does the problem also exist with that? You may wish to try running Konsole with: konsole -graphicssystem raster
Yes with the different font. -graphicssystem raster does not help. Actually mrxvt works like a charm with monospace and Bitstream Vera Sans Mono. What would be the difference between i.e. specific to scroll speed optimization?
My observation is konsole does eat more cpu than xterm/rxvt-unicode when scrolling in vim, but the user experience is almost the same. The scrolling speed is fast and smooth, at least for me.
Sorry to post to an old thread but I've encountered the same issue(vim scrolling jerky) in Konsole 2.11(KDE 4.11). I've fixed the issue with launching Konsole with: konsole -graphicssystem native Whether the KWin use raster or native, I have to force Konsole use the "native" graphic to get the performance. My distro is OpenSUSE 12.3. BTW. is there any way to configure the Konsole to use native graphic system instead of typing the whole long command in the launcher?