As others have noted, the issue isn't execution speed. Rather it's the fact that the memory and disk requirements increase by 10% which has a measurable effect

As others have noted, the issue isn't execution speed. Rather it's the fact that the memory and disk requirements increase by 10% which has a measurable effect on cost. We currently load the entire program into RAM to make things easier, so anything to lower storage requirements is a win. Someday we'll be able to mmap the disk to do XIP, but we don't have that implemented yet.