Don't use setdefault() for memoization
Don't use setdefault() for memoization

The simple setdefault() usage for memoization was worthless, since
we were making the memoized call either way.

meska/cobe,wodim/cobe-ng,pteichman/cobe,meska/cobe,DarkMio/cobe,LeMagnesium/cobe,wodim/cobe-ng,tiagochiavericosta/cobe,DarkMio/cobe,pteichman/cobe,tiagochiavericosta/cobe,LeMagnesium/cobe