I am running Gimp on an old laptop and using Linux operating system.
Using Gimp 2.8.18 now, trouble is I find it slower, sometimes has brush lag and is generally slower than running photoshop under wine!
Can I make any adjustments to preferences to help it perform better.
I have tried removing brushes I don't need.
I am using the standard theme, can I tweak it?

EDIT
ok so far have increased the tile cache size a lot and turned off colour management and things seem to be noticeably better.

I saw a youtube video saying that you can speed up brushes and movement rendering by switching off the rulers and I must say that it works wonderfully.

You can create a shortcut by going to [Edit] [Keyboard Shortcuts] and typing in "Show Rulers" selecting it and typing in a new Accelerator. I do "Ctrl + Shift + R".

You can also go to Edit>Preferences>Image Windows>Appearance and untick show rulers in both normal and full screen modes.

Then you can just use your shortcut key option or View>show rulers to get them back when you need them.

oh I had already turned off showing rulers so maybe that is partly the reason for better performance now, I put it down to the tile cache size but perhaps it wasn't.

I did that and now the rulers are off until I turn them on. That works good.

I turned my ruler off now,
I don't think i ever used the ruler before. just based everything of pixels

You can drag guides out from rulers. And sometimes I need the ruler to see where the position is that I need to mirror a path.

Oh yeha guides i guess i have used rulers then.

@Born2BeMild

It might/might not help if you give details of the system, available resources and size/number of images open at any one time. Do you have a lot of brushes/fonts installed?

This is an old lenovo x61 notebook, c.2007 running xubuntu 16.04
2GB memory but the cpu is half decent, 2 GHz and it has a SSD installed.



Open a terminal and execute top for a list of processes and usually these days there is some monitoring info via the menubar.

This is Gimp 2.9.5, no brush lag and quick enough for me. No where near to using the swap partition.

I'm running Arch linux on an old laptop (acer travelmate) with 1.5ghz cpu (single core) and 1.5gb ram.
Gimp 2.8, hardly any extra brushes or fonts.
I was getting some brush lag but none now I made the changes I mention above. So I am happy now but not sure how it will be when gimp 2.9 or 2.10 is in the arch repositories.