Tiles can be created together with tile painting. Extra timer just creates additional CPU usage.
Created attachment 96900 [details] Patch
Slava, Jocelyn: Is this still relevant?
Does not appear to be so. Please re-open if I'm wrong.
Comment on attachment 96900 [details] Patch Clearing review after the bug has been closed. But Kenneth and Alex have been working on cleaning up the tiling code and may be interested in this.