Back in June there was a thread called "CFFILE Performance" about this on the BlueDragon Interest mailing list that might be helpful to you, Rick. I know you're a subscriber and that you probably have those emails handy. But for those who don't, you can search the archives of the list here:
http://www.newatlanta.com/c/products/bluedragon/self_help/archiveSearch/show Search Josh -----Original Message----- From: Rick Root [mailto:[EMAIL PROTECTED] Sent: Thursday, August 17, 2006 11:03 AM To: CF-Talk Subject: Performance problem I have some code that dynamically generates CSV, TAB, and EXCEL (HTML tables) from a query, and it is running pretty slowly. A lot slower than I'd like it to. Essentially, I set a bunch of variables like START_PAGE, END_PAGE, START_ROW, END_ROW, START_FIELD, and END_FIELD that allow me to loop through the query and loop through the list of fields and output the data in the appropriate format. I added some debugging code and generating 124 rows took 19 seconds. Generating 1416 rows took 309 seconds. Which means if someone wants to generate a drop with 5,000 rows, it's gonna take a long freakin' time! It seems like it shouldn't be that slow. It's only writing every 100 rows to disk (the 124 record file was 445KB). And a couple of cflog statements indicate that the file write takes less than a second. Here's the query loop that outputs the rows of data. <cfloop query="resultSet"> <cfset fileOutput = fileOutput & START_ROW> <cfloop list="#fields#" index="ThisColumn"> <cfset field = evaluate("resultSet.#ThisColumn#")> <cfif field eq "" and format eq "EXCEL"><cfset field=" "></cfif> <cfset fileOutput = fileOutput & START_FIELD> <cfif format eq "CSV"> <cfset fileOutput = fileOutput & csvFormat(field)> <cfelse> <cfset fileOutput = fileOutput & FIELD> </cfif> </cfloop> <cfset fileOutput = fileOutput & END_ROW> <cfif currentRow MOD 100 is 0> <cflog text="writing file #now()#"> <cffile action="APPEND" file="#application.udf.ROOT_DIR#\tools\entityLookup3\drops\#filename#" output="#fileOutput#" addnewline="No"> <cflog text="done writing file #now()#"> <cfset fileOutput = ""> </cfif> </cfloop> I suspect that it's the Evaluate() that's running slowly. Any ideas on how to speed this code up? Thanks! Rick ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Introducing the Fusion Authority Quarterly Update. 80 pages of hard-hitting, up-to-date ColdFusion information by your peers, delivered to your door four times a year. http://www.fusionauthority.com/quarterly Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:250178 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
