Optimization Question

**joligario** · #1 07-25-2009, 03:46 AM

Looking at a few things with the EMU and PEQ database and had a question.

Which way would be faster if there is much difference? Assuming that about 1000 entries are read in from the database and 20% of the entries are larger than 256.

Code:

heading = db.heading;
if heading > 256 { heading = heading % 256; }

or

Code:

heading = db.heading % 256;

My initial assumption is that the if statement would require more processor use if that remains 20%. Now, if that is the difference, what if I were to reduce the entries to 0% larger than 256. Would that change the processor use in either direction?

EvoZak · #2 07-25-2009, 02:56 PM

Have you profiled this to be an actual problem?

**joligario** · #3 07-25-2009, 11:58 PM

No, but with 18600+ entries in the database being 256+, I would assume that it would take some calculations. That's why I was wondering what the difference would be, if any. If it doesn't matter, I wouldn't recommend a change. After PEQ comes back up, I will still change all the headings. I was just checking if any processor power went into it.