5% improvement is basically the minimum I usually consider worthwhile to pursue, but it's still small. Once you get to 10% or 20%, things become much more attra

5% improvement is basically the minimum I usually consider worthwhile to pursue, but it's still small. Once you get to 10% or 20%, things become much more attractive. I can see how people can go either way on a 5% increase if there are any negative consequences (such as increased build time).