What is faster: sprintf or round?

[MarkB423]

Just curious what function is faster:

sprintf or round?

I will be using the function for rounding to currency, as follows:

$num = sprintf('%01.2f', $num);

OR

$num = round($num, 2);

The number_format() function is not what I need, as this adds commas, which cannot be used when doing calculations.

Thanks.

[killerbishop]

Unless you plan to be looping over that function call several times, there's no point to benchmarking this. Speed issues only matter when a CPU intensive operation would occur a large number of times (by loops) or benchmarking shows it to be the bottleneck in the code.

If you really want to know which one is faster, look at the source code for both functions. If the sprintf() is just a wrapper to C's sprintf(), this might actually be faster than a natively written round() function (hell, round() might even be calling sprintf()!).