Would it? I thought dealing with integers - a value, in binary - would be faster than floats - a value in binary, a decimal places value, whatever odd logic there is required to hide the leaky abstraction.
Edit: nevermind. Since the conversation was 'decimal versus float' I thought 'decimal' meant integers without floating points.
If decimals means a decimal point, I think a better suggestion would be to use integers.
On modern CPUs, it's faster to cast a number to double, do a square root and cast back to int, than even the cleverest bithacking int algorithm.
Ironically, this is a much better description of `decimal` than of `float`.
IEEE float math is done in hardware. It is "one value in binary" that is added, subtracted, multiplied, etc etc with electric circuits.
The decimal abstraction requires manually keeping track of the number of significant digits, converting back and forth so that two different decimals can be added / multiplied, etc etc. There's a lot more that has to happen besides asking the CPU to do a single operation.
Its easy to think of "decimal" as one thing because every language provides a library called `decimal`, but there are a million subtle decisions and tradeoffs to make when choosing one standard binary representation. Most languages don't have a binary representation at all, and implement `decimal` as a high level abstraction with regular integers.