Apparently Number(“1234”) is the same as a shorthand version: +”1234”. Both of these will convert a string into a number and will give NaN if the string can not be converted to a logical number.
Performance-wise, different browsers seem to give different results as to which one is faster. I think we should make it standard practice to use “+” instead of Number() for casting to Number in FlexJS. It will save 7 characters for every cast. Harbs