I don't have experience with MySQL so I probably would point to that as a likely problem. Like most developers we have many clients converting to Win7 with no problems at all unlike the nightmare we had with Crapsta.
We have noticed one thing that may be of interest: We have a client with a new Win7 system with 12gb memory. It takes a long time to load but the client states it is many times faster during data entry and creating reports. My explaination (with no proof) is that our VFP9 SP2 compiled program is loading all the programs and data into memory. We do open several data files before the first screen shows. Also, our program does not destroy screens (they are in memory and are reused) so as you use the program it seems to get faster. Our program and all the initial data would easily fit into 1gb memory so I can't explain why 12gb would be that much faster than a similar win7 computer with 4gb. It must be something to do with the operating system and memory management or hardware. ----- Original Message ----- From: "Mike Copeland" <[email protected]> To: <[email protected]> Sent: Wednesday, March 02, 2011 12:02 PM Subject: Windows 7 + VFP9 speed problem It's been a while since I've been on the list, but I've run into a real buzz-saw of a VFP problem, thanks in part to Windows 7. I'd really be appreciative of any and all thoughts on this issue as I'm stumped. Application: A monolithic accounting application with a few dozen forms. Compiled exe is 6MB Platform: Win XP or Win 7 (32 or 64 bit) plus VFP 9 SP2 and MySQL Add to the mix: DBI Technologies ctGrid OCX file (although I don't think this is the source of the problem) Hardware: Not relevant, but 4GB RAM, Dual Core 3Ghz Intel CPU on Intel G31 Mboard Problem: When loading a form, depending on the platform, it can take 160x as long to finish. Task: Load 23,000 SKU #s into a combo. (details below) Times below are very very consistent, varying only about .10 second each run. Scenario 1: Windows XP, compiled VFP exe application, all files local (except MySQL data) FAST....as in 1/2 second Scenario 2: Windows XP, run app from source code on VFP IDE, all files local FAST...again, around 1/2 second Scenario 3: Windows 7 (32 or 64 bit), source code on VFP IDE, all files local FAST...1/2 second ...here's the problem Scenario 4: Windows 7, compiled exe app, all files local SLOW....80 seconds This happens on multiple forms that have almost identical code. ...here's the head banger Scenario 5: Windows 7, running compiled exe from a Linux Samba share FAST....actually a bit faster than running on Windows XP...less than 1/2 seconds Windows 7 is becoming unavoidable. The solution seems to be to run the app from the server, but many details (storage of window sizes, auto update to new version, etc.) have been designed for local workstation storage. What I can not understand is why Scenario 4 is so radically different. Any suggestions? What I've tried: 1. Turned off UAC completely. (Started with UAC on, of course.) No effect. 2. Change ownership of the folder the files are stored in. No effect. 3. Installed full VFP IDE, removed, installed VFP9 SP2 run-time only files No effect, although I was surprised at how fast it was (Scenario 3 above) 4. Introduced delays into code loop...i.e., DOEVENTS and "wait window '' nowait" 5. Tried saving SELECTED data in a local DBF and loading from DBF. (This did tweak the timing a little, like 4 seconds out of 80) Even tried saving static data in DBF and not even involving the MySQL process. 6. Created single form with nothing but the DBI grid OCX object and compiled as a 48Kb application. This ran fast, 1/2 second to load, but while informative it is hardly useful. 7. I've tested and tried placing the TMPFILES location local and remote, and let Windows manage it vs. "manual override." No change. All in all, it seems to be pointing at a problem with the interaction between Windows 7 and VFP9 SP2 and memory management. I'm sure I've missed something, and I know this is a lot to read, but I would very much appreciate any suggestions. I know of no better place to go than here where the best and the brightest connect. Oh, here's the code from the INIT event on the form (I've tried various other events, and even put it in the click event of a button on the form, no change) Also, you'll notice there's no indication of how I'm getting the data from MySQL. The sample below has the same speed issues described above, but as you can see the retrieval from the MySQL server is not involved in the timing and is actually very fast in all scenarios. ---------------------------------------------------------- MESSAGEBOX('Starting to load Grid. Click OK to start...',0+64,'Notice') LOCAL ttimestart,ttimeexp SELECT sku FROM skus into temp WHERE active=1 order by sku SELECT temp GO TOP IN temp ttimestart=seconds() SCAN WHILE !EOF('temp') thisform.ctGrid.addcomboitem(1,temp.sku) ENDSCAN ttimeexp=seconds()-ttimestart MESSAGEBOX('Finished.'+CHR(13)+ALLTRIM(STR(RECCOUNT('temp')))+' items added.'+; CHR(13)+'Time elapsed: '+ALLTRIM(STR(ttimeexp,6,2))+' seconds',0+64,'Notice') ------------------------------------------------------------------------- Thanks again! Mike Copeland [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/0d3e01cbd9b4$9a810b00$7a00a8c0@w2k3s02 ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
