[mkgmap-dev] Style branch

Tue Feb 2 01:04:10 GMT 2010

After reworking and shrinking my style-file for the style-branch, 
Austria needs around 5:30 min on my PC to compile. Before I needed 
around 3:00 minutes with a style-file optimised to work around the bugs 
-  (that was before I crashed my style-file and had to rebuild large 
parts, speed was not much slower than using default style-file). With my 
intermediary style-file that ran more or less with style-branch as well 
as old trunk, it changed from 4min trunk to 6min style-branch.

In general now:
Action rules don't seem to add a lot of time.
Continue adds a modest increase
Continue with_actions is the main driver for increase in compile time, 
as are long key!=* checks.

On the other hand I found some bugs that I had not discovered before, as 
I could shrink my style-file from 1.3MB down to 292KB (still around 
50KB-100KB overhead due to set key=value redundancies, or checks that I 
could simplify because due to naming now done up front I don't really 
need them anymore). Especially the naming of streets is now for the 
first time easily possible and works as expected. I was always too lazy 
to add the naming complety (would have blown up my style-file even more).

Basically, the more ways on which you use continue or continue 
with_actions, the bigger the time penalty.