drawRect Performance issue, While scrolling

When scrolling
The performance goes down after loaded more than 400 visible entries of data for each dataSet of around 6 dataSets.
The performance is good when less than 100 visible entries for each dataSet

I'm wondering if ShapeLayer and Bezier could help
then hand out the drawRect staff to GPU


The issue names drawRect, ShapeLayer, and Bezier but no file or test. Start by profiling scrolling with more than 400 visible entries across about six data sets, focusing on the drawRect rendering path. Done would mean improved scrolling performance, but the issue does not define a target or validation test.

Written by the indexing model from the issue text.