low performance when add a graticule overlay to map and zoom-in to big scale

[kevanTai]

as title, for 4.2.0 version, when add a graticule(line) overlay to map and zoom in to big scale, it have low performance if drag map.

[bartvde]

what release was the performance still ok for you?

[kevanTai]

as graticule example --> https://openlayers.org/en/latest/examples/graticule.html
when zoom in to big scale, then to move map, the map move very lag.

but test on openlayers 2 version, same with the case (show graticule labels on map and zoom in to big scale then move map), it not have lag issue

for Ol2 graticule example --> http://dev.openlayers.org/examples/graticule.html

[JackD83]

Its caused by the line dash. Remove it and its fast again. Same happens on all dashed lines and large zoom factors

[kevanTai]

Great~!!! 👍

I just tested it (remove line dash), it can fast to draw when zoom-in to big scale and move map.

Very thanks, JackD83 and bartvde .... : )