Actually, not necessary when using minifiers

Use Single variables when possible

while (true); // usual while (1); // better for (;;); // best

Functions

Reduce functions since they take up extra 11 bytes each.

function(){} 012345678901





However, with JSCrush, they could be compressed. Reuse function signatures for more savings with compression.

x=function(a,b,c,d,e){ y=function(a,b,c,d,e){ becomes xF,yF where F = function(a,b,c,d,e)

No need for names, i f function is used once