How can I render line faster than CGContextStrokePath?

Question

I\'m plotting ~768 points for a graph using CGContextStrokePath. The problem is that every second I get a new data point, and thus redraw the graph. This is currently taking 5

Answer 1

You don't have to rasterize whole path every time you draw it - you can cache it as raster bitmap. BTW, your idea with "scrolling" is standard solution for such task...