Performance issue on large input

[kamyabzad]

When using Rofi dmenu mode on large input (a couple of million lines), it's too slow, while dmenu itself is quite snappy. Does anybody have any idea how could I improve the performance?

Rofi command:
$ cat dict.index | rofi -dmenu -sync

dmenu command:
$ cat dict.index | dmenu

[DaveDavenport]

Rofi was not really designed to filter millions of lines.

Can you explain what is slow? (opening, filtering, scrolling, displaying?)

[kamyabzad]

It will be great if we could improve filtering performance. Might tackle it in my free time. Thanks!

[DaveDavenport]

made some tweaks on the branch huge-list-speedups, this might improve things a bit by reducing the number of filter actions.

[DaveDavenport]

If possible please test that branch, I also rewrote the async reading (not to use GInputStream from glib) so that is now a lot! faster too.

[DaveDavenport]

reading 15 mil lines sync is now 3.8s for -sync, around ~5 seconds in async mode (to finish reading, its usable instantly).

[kamyabzad]

This is exactly what I had in mind! Thank you.