Not sure your performance claims are valid without (1) profiling the performance and (2) accounting for the different access patterns/performance concerns betwe

Not sure your performance claims are valid without (1) profiling the performance and (2) accounting for the different access patterns/performance concerns between rendering text and icons. (That is, the dominant pattern in rendering text is rendering strings of characters in a line/rectangle, while for icons it's a relatively much smaller number, one at a time.)