Unbelievable performance gain by changing an Algorithm

Algorithm Change

Kanchi Raghuraman Kesavan — Tue, 07 Dec 2004 03:21:00 GMT

Wow !! That Explains why the Earlier Software Runs Amazing Fast in VFP 8.0

Thanks for the Insight , I thought the Credit went to P4 2.2 , 1 Gig RAM

re: Unbelievable performance gain by changing an Algorithm

Nick Parker — Tue, 07 Dec 2004 04:12:00 GMT

Ok, I've never worked with FoxPro, but in your example I can only assume you are late-binding to the COM object you are requesting. That said, I am surprised that you get intellisense, as you don't in VB6, only with early binding is this available (for VB6 that is). I'm assuming that under the covers you using the IUnknown pointer to request an ITypeInfo pointer to display specific information to the user? If this is the case, which makes it much more helpful for the programmer that doesn't read documentation I wonder why this wasn't implemented in VB6?

re: Unbelievable performance gain by changing an Algorithm

Fabio Vazquez [MVP] — Tue, 07 Dec 2004 12:37:00 GMT

Hi Calvin,

Congratulations! This is the kind of blog entry we would expect from Microsoft people! Clear, Concise and highly explanatory.

Great entry! Keep on the excellent work!

re: Unbelievable performance gain by changing an Algorithm

Calvinh [MS] — Tue, 07 Dec 2004 17:49:00 GMT

Fabio: Thanks for the feedback. Naturally, positive feedback will lead to more similar posts

Nick: Great idea for a new blog: stay tuned.

Kanchi: As always, improving performance means taking out the slow parts!

Intellisense: inspecting live objects

Calvin Hsia's WebLog — Thu, 09 Dec 2004 02:04:00 GMT

re: Unbelievable performance gain by changing an Algorithm

Russell Campbell — Thu, 16 Dec 2004 02:07:00 GMT

Yes, this was one that was greatly appreciated. There were techniques people used to not instantiate objects until truly needed in order to keep the code speedy. So not only did you increase the speed, but you let us get rid of unnecessary code, thereby lowering the chances of bugs and lowering the maintenance chore.

re: Unbelievable performance gain by changing an Algorithm

Anatoliy Mogylevets — Thu, 16 Dec 2004 14:38:00 GMT

Thanks to Alex Feldstein pointing at this blog. Valuable info, good insight; for sure I will stay tuned. Clavin, thanks!

Good site

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