Can WPF render a line path with 300,000 points on it in a performance-sensitive environment?

Question

A simple XY line graph: The X axis will represent the complete range of possible rating percentages, from 0% on one end to 100% on the other. Specifically, the X value will

Answer 1

If you want it to be fast, the best way is to derive from Control and implement OnRender - normally this isn't necessary, but for your application it might be.

Also, let's take a step back - the screen you're rendering to certainly isn't 300k pixels across; before you go to render, reduce the buffer by averaging n nodes into one until you've got something closer to the resolution of the actual device, then draw it on-screen.