Performance problems with more than 150 paths

[a1an77]

I have a number of paths to display that can grow large at lower zoom levels, hence I noticed a sensible performance degradation when displaying more than 100 paths, up to few hundreds. Around 200 it takes a bit more than 3 seconds to get them on the map at 700 it gets up to 7 seconds, which is a bit too much for an interactive map.

With a bit of profiling in FF I pointed out the issue to lie at textRedraw and setText methods.

Attached a section of the profile which indicates in green the time taken to populate a layer with labelled paths, while the darker red section shows the time taken to add event handlers to the same number of paths.

To be noted also that most of the paths, since they are at a low zoom level (hence seen from up above) end up with having no label at all as it won't fit the path.

[leplatrem]

Thanks for your feedback!

Don't hesitate to open a pull-request if you have ideas of optimizations!

[nekromoff]

Confirming with 100+ paths.

[jeetdas]

Any updates here?