loss of performance vector tile with lots of features

[fabienwnklr]

loss of performance vector tile with lots of features

[ahocevar]

The flat styles you're using in that examples are not yet optimized for a lot of data. Try using ol-mapbox-style. It has the advantage of supporting the same Mapbox Style JSONs that MapLibre uses. If that's not what you want, use classic styles (ol/style/Style) with style functions.

[fabienwnklr]

thanks for answer, but i need to use conditionnal logic for style , so i try to use function (or style expressions) and if i do something like this, lag again .. codesandbox

note : if i use flat style in OL v7.5.2 no lag..

My final code using style expression is like this

[ahocevar]

Your second example (with classic styles) creates a new Circle style for every call of the style function. You should cache that Circle style, or pre-create one with each color you want.

Did you also try ol-mapbox-style? That's the most convenient option, especially when you have a Mapbox/MapLibre style already, because you can use it without any changes. It also does all necessary performance optimisations.

[fabienwnklr]

yup, i try ol-mapbox-style and it's clearly more efficiant, the only negative point that i don't have any json style, so i need to create it.

Thank's for you'r answer !