>Every line of code we write is interpreted by vfp on the fly. Certain lines of code are the equivalent of calling major c++ functionality - not compiled on the fly.
>
>

>go top
>do while not eof
>  if condition
>    replace field
>  endif
>  if not eof()
>    skip
>  endif
>enddo

>
>versus
>
>

scan for condition
>    replace field
>

>
>versus
>
>

replace something for condition

>
>The last should be the fastest because vfp is doing all the work, not your custom code.

I agree with your examples, but which code would you prefer in the following case:

local lcClient, lcCarrier
select some data into cursor to process order by Client, Carrier

scan
  lcClent = client
  lcCarrier = carrier
  scan while Client == m.lcClient and Carrier = m.lcCarrier
    * some processing logic
  endscan
  skip -1 
  * Create file, do some additional processing
endscan

versus

lcClient = client
lcCarrier = carrier

for lnI = 1 to reccount('curProcess') + 1
   if Client <> m.lcClient or Carrier <> m.lcCarrier or m.lnI = reccount('curProcess') + 1
    ** Create file, do some additional processing
   else
     * do other processing logic
   endif
   if not eof()
     skip
   endif
next

Looks like the first should win?