c# – How to properly process and draw a large amount of data?

Question:

Good afternoon.

Given a set of points (100.000-500.000). The points form curves (waves) that are displayed on the graph. Chart example

Now the program works in the following sequence:

1. Reading points from a file
2. Creating a bitmap
3. Convert point values ​​to bitmap coordinates
4. Writing points to bitmap via Graphics.DrawCurve()
5. If you need to paint over a part of the wave (for example, the positive part) – find the intersection area of ​​​​some areas through Region.Intersect and fill it.
6. bitmap drawing

The program is running slowly.

1. Is GDI+ suitable for displaying large amounts of data? Or should I use something else?
2. What is the correct sequence of actions?
3. What is the right way to convert values ​​to coordinates and at what point?
4. What to read?

Thank you.

Answer:

I can advise you to discard points that are not visible (superimposed on each other) due to the scale. There is a Douglas-Peker algorithm for this.