base64StringForIconNameAndType shows up as taking about 0.65% of the PLT5 score, so improvements here may be profitable.
<rdar://problem/90663895>
I ran a simple test by making the image loading asynchronous, and found that it was perf neutral. We can probably focus on removing the base64 encoding and possibly reducing the number of calls into JS. Hopefully this is an improvement, and we aren't just measuring the time taken to load the bundle from the file system.
Closing old bugs assigned to me