In RederingExtensions the:
* First point is always added regardless of whether it's inside the clipping region or not
* First point of every clipped line segment is skipped
In addition, there are a couple of performance issues:
* Boxing is occurring on every ScreenPoint
* New lists are constantly being created instead of just clearing the old list
I think I fixed the issues (see attached). I also added another performance improvement of injecting the intermediate output buffer for ScreenPoints. This prevents the buffer from constantly copying itself and stressing 3rd generation garbage collection. This may be able to be omitted in lieu of presizing the buffer. However, I chose the less clean interface to reduce the risk of garbage collection killing our app. This is just for our stuff, since we're rendering millions of points using MVVM. The garbage collector was actually killing our application performance due to Oxyplot (we run an instrument and it was shutting our data collection down). _BTW, do I need to copy your copyright into the attached file, or is it OK to just simply include the license file in our distribution & installer?_
I actually have permission to give you the full source that allows us to render millions of points using MVVM if you desire. You could incorporate everything but data appendage into your project without messing things up too much. There are a few things that you could do cleaner by having it in your source. I have some code for data appendage also, which doesn't require any series to be redrawn, but has some extra state to manage. Just let me know if you would like any of this.
Comments: I think changing to array and making the fields of the `ScreenPoint` struct public could make some difference. See https://gist.github.com/oeb/9949912
* First point is always added regardless of whether it's inside the clipping region or not
* First point of every clipped line segment is skipped
In addition, there are a couple of performance issues:
* Boxing is occurring on every ScreenPoint
* New lists are constantly being created instead of just clearing the old list
I think I fixed the issues (see attached). I also added another performance improvement of injecting the intermediate output buffer for ScreenPoints. This prevents the buffer from constantly copying itself and stressing 3rd generation garbage collection. This may be able to be omitted in lieu of presizing the buffer. However, I chose the less clean interface to reduce the risk of garbage collection killing our app. This is just for our stuff, since we're rendering millions of points using MVVM. The garbage collector was actually killing our application performance due to Oxyplot (we run an instrument and it was shutting our data collection down). _BTW, do I need to copy your copyright into the attached file, or is it OK to just simply include the license file in our distribution & installer?_
I actually have permission to give you the full source that allows us to render millions of points using MVVM if you desire. You could incorporate everything but data appendage into your project without messing things up too much. There are a few things that you could do cleaner by having it in your source. I have some code for data appendage also, which doesn't require any series to be redrawn, but has some extra state to manage. Just let me know if you would like any of this.
Comments: I think changing to array and making the fields of the `ScreenPoint` struct public could make some difference. See https://gist.github.com/oeb/9949912