On 15/12/2012 22:08, Jeff Palmer wrote: > : > > > rt.jar went from 50,469 KB to 24,207 KB. That's a 52% reduction! Copied new-rt.jar over rt.jar in java-lib, and my apps still work. Anyone know why rt.jar is so big? Alignment or compression level maybe? rt.jar is not compressed by default. -Alan.