1. A concise explanation of the problem you're experiencing.
I have 5 queues, each storing up to 600 semi transparent polygon entities. A unique polygon is added to each of the 5 queues each second from an external source. Once the queues are filled to 600 (after 600 seconds), I hide and remove one polygon from the queue and data source each second.
In theory this should result in 2*5 = 10 polygon updates/second. 1 per queue that is removed/undrawn, and 1 that is added/drawn each second.
I am concerned that for the other 598*5 "static" polygons which often overlap, that removing one of the overlapping polygons causes the rest to change shading, thus slowing the drawing/frame rate of the entire application.
I am running a dynamic application with around 20 other entities being dynamically updated each second.
As the queues fill to their maximum size of 600 entities the application starts to slow down considerably - at this point it is displaying 3000+ entities (600 entities per queue * 5 queues + the 20 other dynamic entities). If I dynamically hide all of the polygons with a button click the drawing/updating of the other entities rapidly progresses to catch up and then steadies. Thus I believe the large amount of polygon entities is slowing down the application.
Based on this:
1)What is the most performant way/approach to implement this workflow within cesium?
2) What are some things I can try to maintain the frame rate with this current design?
3) Is it possible that removing/adding a semitransparent polygon in a stack of overlapping polygons is changing the shading of the other polygons, thus leading to the slow down in drawing?
2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.
Each letter/digit represents a unique polygon. Each enclosed bracket is the queue as it is updated in time.
t = 0sec t = 1 sec t = 5 sec t = 6 sec etc
1)< > < a > < t,o,j,e,a > < 1,t,o,j,e >
2)< > < b > < u,p,k,f,b > < 2,u,p,k,f >
3)< > < c > < v,q,l,g,c > < 3,v,q,l,g >
4)< > < d > < w,r,m,h,d > < 4,w,r,m,h >
5)< > < e > < x,s,n,i,e > < 5,x,s,n,i >
3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
Dynamically show/hide entities based on when they were received in the cesium application.
4. The Cesium version you're using, your operating system and browser.
Cesium 1.5. 64bit i9 2.9ghz. Chrome.