Javascript Performance: `if (a in b) {b[a]()}` vs `a in b && b[a]();` vs object traversing

I noticed I can use a && b(); as a shorthand for if(a) {b()} or if(a) b();. The MOST usual case for this indecision is for objects having 4-5 elements.

Question: is there a performance gain/loss for using the shorthand when compared with an iteration of if(){} or regular object traversing for (var i in b) { b[i]() } ?