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Enhancing Performance
Message
From
20/06/2014 12:33:17
 
 
To
20/06/2014 07:40:56
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Environment versions
Visual FoxPro:
VFP 9 SP2
OS:
Windows 7
Network:
Windows XP
Database:
Visual FoxPro
Application:
Desktop
Miscellaneous
Thread ID:
01602118
Message ID:
01602139
Views:
104
Have you used Coverage Profiler to determine how long it takes to run each line of code?



>Using the following code I am updating some Data in a Cursor which has more than 5000000 Records.
>
>The Initial Speed is tremendous but as the number of records scanned the speed gets slow down. Kindly Guide How could I enhance the performance.
>
>Any alternative suggestion or Idea is also welcome.
>
>Here is my code
>
>
>
>Insertone=0
>Inserttwo=0
>lmultipage=.F.
>
>SCAN
>Newpath=Newpath
>WAIT WINDOW m.Newpath NOWAIT
>CREATE CURSOR BillFile (POS Varchar(254))
>APPEND FROM (m.Newpath) SDF
>
>SELECT Billfile
>
>GO Bottom
>DO WHILE NOT BOF()
>
>IF LEFT(POS,8)='(Page 1)'
>cTextone='<</Duplex false/PageSize  [595 842] /Tumble false /ManualFeed false /MediaPosition 0>>  setpagedevice'
>Insertone=1
>Inserttwo=0
>ENDIF
>
>IF LEFT(POS,8)='(Page 3)'
>lmultipage=.T.
>ENDIF
>
>
>IF LEFT(POS,8)='(Page 2)' 
>Insertone=0
>Inserttwo=1
>
>IF lmultipage=.T.
>cTexttwo='<</Duplex true /PageSize [595 842]/Tumble false /ManualFeed false /MediaPosition 2>> setpagedevice'
>ELSE
>cTexttwo='<</Duplex false /PageSize [595 842]/Tumble false /ManualFeed false /MediaPosition 2>> setpagedevice'
>ENDIF
>lmultipage=.F.
>ENDIF
>
>IF POS='%%BeginPageSetup' 
>IF Insertone=1
>INSERT Blank
>Replace pos WITH cTextone
>Skip-2
>Insertone=0
>Inserttwo=0
>ENDIF
>ENDIF
>
>IF POS='%%BeginPageSetup' 
>IF Inserttwo=1
>INSERT Blank
>Replace pos WITH cTexttwo
>Skip-2
>Insertone=0
>Inserttwo=0
>ENDIF
>ENDIF
>
>
>Skip-1
>WAIT WINDOW 'Remaining Records...'+ALLTRIM(STR(RECNO())) NOWAIT
>ENDDO
>
>Set Textmerge On
>Set Textmerge To (m.NEWPATH) Noshow
>Scan
>\\<< TRIM(POS) >>
>\
>Endscan
>Set Textmerge To
>Set Textmerge Off
>SELECT New_bills
>ENDSCAN 
>
>
>
>
>Regards
>Harsh
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer
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