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c#.netdecimalint32

Determine if a decimal can be stored as int32

I am doing some custom serializing, and in order to save some space, i want to serialize the decimals as int, if possible value wise. Performance is a concern, since i am dealing with a high volume of data. The current method i use is:

if ((value > Int32.MinValue) && (value < Int32.MaxValue) && ((valueAsInt = Decimal.ToInt32(value)) == value))
{
    return true;
}

Can this be improved?

Solution

  • Do you have any negative values? I'm guessing yes since you have the MinValue check, otherwise you can skip it. You could even use unsigned int which will allow you to convert more of your double values into ints.

    Edit: Also, if you have more positive numbers, you can swap the first two conditions. That way the first one is the most likely to fail, decreasing the total number of comparisons.