Is Multiplying the Inverse Better or Worse?

Question

When dealing with double data types is multiplying by the inverse better or worse?

Which way is faster? Which way uses

Answer 1

With most processors, it's faster to multiply than divide. But it's really insignificant for most applications, in my opinion you're better off with whichever is more readable, unless profiling shows it's a critical path.

If it's an interpreted language, the amount of time to read the source and convert it to numbers will overwhelm the time taken to actually do the math, especially if you use that many significant digits for the multiply. (Are you sure you really need that many significant digits?)