>>>>But I prefer to use hexadecimal value that will always result 4 bytes length.
>>>>
>>>>

>>>>m.lcNewID = SYS(2015) + RIGHT(TRANSFROM(Application.ThreadId, "@0"), 4)
>>>>

>>>>
>>>>What do you think, sir?
>>>>
>>>>
>>>>Regards,
>>>>Onytoo
>>>
>>>You are only creating the name of a variable, so the difference will be zero.
>>
>>Actually, one: one byte per key value.
>
>My point was that the length of the variable itself, should have close to no influence on the result. And by result I mean the processing time.

This being a key, and the likelihood that the extra byte will cause the blocks to fill a tad faster... if a single instance of the app is likely to issue multiple such keys, I'd rather put the thread it (represented by either 4 or 5 bytes) first, and sys(2015) second. Then the first nine bytes, at least, may be the same for all the keys issued by the same instance, which should help Rushmore engine to keep them small, hence use less memory etc. I expect a whooping 1% of increased performance in that case.