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SCAN vs DO WHILE: Which is faster?
Message
 
To
15/06/1999 16:23:08
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00230167
Message ID:
00230190
Views:
30
I'd test it. I'd like to hear your results. I just use the seconds function to check how long somthing took...

Joe

>I have been given the task of optimizing the performance of a block of code (too large to be copied here). Currently, the code contains a mix of SCAN..ENDSCAN loops and DO WHILE..ENDDO loops. Some of the WHILE clauses are not Rushmore-optimized, so normally my first step would be to replace these with optimized statements. In some cases, however, this may not be possible.
>
>While I'm at it, I was going to replace the DO WHILE..ENDDO loops with SCAN..ENDSCAN. However, someone mentioned to me that when using non-optimized statements, a DO WHILE..ENDDO can actually give better performance than a SCAN..ENDSCAN. Is this true? I've always used SCAN..ENDSCAN, but some of the legacy code I'm looking at uses DO WHILE..ENDDO.
>
>Bill
Joseph C. Kempel
Systems Analyst/Programmer
JNC
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