Infinite scroll 2D is really slow with polygons

CesiumGS / cesium

An open-source JavaScript library for world-class 3D globes and maps :earth_americas:

https://cesium.com/cesiumjs/

Apache License 2.0

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Infinite scroll 2D is really slow with polygons #5026

Open hpinkos opened 7 years ago

hpinkos commented 7 years ago

Open the viewer
Drag drop the attached GeoJSON file
Switch to 2D mode

The map is lags pretty badly in 2D infinite scroll mode. The performance is fine in 3D and is much better if you use the rotatable 2D map instead

vienna.geojson.txt

hpinkos commented 7 years ago

@bagnell a number of users on the forum have been complaining about slow polygons when upgrading from 1.2x to 1.30+. Do you know of anything that changed that might have caused that?

pjcozzi commented 7 years ago

@hpinkos do you have links to the forum issues?

@bagnell sounds like something is being computed per-vertex/triangle per-frame. Perhaps it is missing a coarse-grained check?

hpinkos commented 7 years ago

Forum posts:

https://groups.google.com/d/msg/cesium-dev/hXC8gxdi3uE/ZBWHUL6jAgAJ https://groups.google.com/d/msg/cesium-dev/wT2jkCrvvGQ/WdrP3QgmAwAJ

hpinkos commented 5 years ago

Also reported by @forest21000 in #7694

ggetz commented 2 years ago

Reported again by @zhangchn in https://github.com/CesiumGS/cesium/issues/10304.

zhangchn commented 2 years ago

Reported again by @zhangchn in #10304.

The performance issue in SCENE2D could NOT be alleviated by using MapMode2D.ROTATE.

0dividedby0-b commented 2 months ago

I am also seeing this same issue, even with MapMode2D.ROTATE enabled. Lower frame rate and higher CPU usage when 2D is compared to 3D.