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    <p>It depends on so many things, not least the developer. I always think that a good developer with poor technology can produce a better product than a poor developer with cutting edge technology.</p> <p>There are many variables which matter in making a decision to migrate. For example:</p> <ul> <li>Is you current database running on a server or a local machine? I've worked for big companies who have servers which are always running out of space. This can really slow down performance. Running locally with lots of memory will always be faster.</li> <li>When you run these rules, do the tables get used in queries or in code? Is it optimised? Are there many levels of queries which it has to go through. Try cutting them down.</li> <li>If there is lots of VBA in the database, try putting lots of debug.print in the code with a timer on it so you can see what parts of the process are running fast\slow.</li> <li>Is there anyone accessing the database while it's running?</li> <li>Do you need to index the tables? Sometimes too much indexing can affect performance especially if it's not required.</li> <li>Maybe you can try normalising elements of your file when it's imported and then run the rules.</li> <li>If the database isn't currently split into a Front End - Back End, try splitting it. Maybe it's too big (compact and repair).</li> </ul> <p>As you mentioned in your post, there are many variables at stake so I wouldn't rush into a migration. Trust me, I've seen it before and there is no guarantee you will get a significant improvement without careful analysis of your current situation.</p> <p>One other thing you could consider rather than migrating, is automation. I worked in a RAD team which ran lots of early morning processes. We simply used Windows Scheduled Tasks to fire up a database at some specific time, search and import files, and then process them. Some processes may have taken a hour but they were all done before we got into the office in the morning so who cares if it took an hour so long as it was complete.</p>
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    1. POWill I see a performance improvement migrating an Access-based VBA tool to a standalone .Net application?
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    1. COThanks for the advice. Specifically the idea of using Windows Scheduled Tasks. One more question... what do you mean by normalizing elements of your file when it's imported?
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      1. USJD Maresco
    2. COChances are there may be a lot of repetition in the columns of the file you're importing. By normalising a table you can eliminate redundancy & repetition in the tables, and make fields 'atomic' (only 1 piece of data in a cell). There's actually a lot more to it thank that. E.g. when you import the file, if there are any columns with lots of duplicate data (e.g users name), you could run some queries to extract the values & stick them in a joining with an id. Then replace the name with that id. That's very short & simplistic answer I know, but worth having a read for future reference anyway.
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