Random real or int, performance wise?

[kentzeus]

Hi, I've seen that people tend to use int instead of real when using random number. I've read something earlier about it being because it has loads of possibilites, for example it can be 0.135123. Is this a thing people do to increase the performance? For example if I want to have 15% chance of something I usually put

• (Random real number between 0.00 and 1.00) Less than or equal to 0.15

Instead of

• (Random integer number between 1 and 100) Less than or equal to 15

 

[Drake53]

I compared the speed of GetRandomInt and GetRandomReal in lua (using os.clock). With 10million iterations, it appears that random integers are around 0.4 seconds faster.

 

[Pyrogasm]

There is no functional difference.

I've read something earlier about it being because it has loads of possibilites, for example it can be 0.135123.

Yes but those myriad possibilities exist between all numbers so the probability distribution is the same.