Faster impl for 1,2,3 args for memoized functions

[artem-zinnatullin]

• Use raw/null-replacement for 1 arg memoized func
• Use Pair for 2 arg memoized func
• Use Triple for 3 arg memoized func
• Use List for 4 and more arg memoized func

This way we save allocation of ArrayList and its backing array (JVM specific-ish) for common cases of 1,2,3 args functions.