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I am facing a strange issue with my vim setup. My vim starts to lag when I scroll a file using arrow keys and by lag I mean the scrolling is very slow and is not at all smooth.

Vim in tilda/guake/gnome-terminal

When using the above terminal emulators vim lags and my CPU usage rose to around 30-35%. I also tried vim -u None file.txt and vim --noplugin file.txt but no significant change was observed although my cpu-usage was around 30% and scrolling was better than previous but it was still slow and lagging. file.txt is around 200 lines.

xterm/eterm/aterm

I get perfect scrolling without any lags.And by perfect I mean smooth scrolling without any delay and that too without any flags like --noplugin etc . My cpu-usage is around 10-15%.

I also tried gvim and in this case the scrolling was somewhere in between tilda and xterm . Although not perfect.

So, what can be the reason behind the lags I get in vim while scrolling because I don't want to stop using my drop-down terminal.

My config: