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SCAN vs DO WHILE: Which is faster?
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From
15/06/1999 16:23:08
 
 
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General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Title:
SCAN vs DO WHILE: Which is faster?
Miscellaneous
Thread ID:
00230167
Message ID:
00230167
Views:
64
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
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