[AccessD] Array faster in DLL?

Hi Gustav,

His son, who now works with him, *likes* to program in Assembler (otherwise,
he seems normal). They used it to replace the millions-of-times-called
routines in a ray tracer, which replaces the vector screen display if enough
time elapses to finish the computations. The product is for kitchen design
and, like the others but better, shows what the kitchen will look like. It's
interesting to watch the screen change, it's as though the display changed
to a picture.

Fred

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Gustav Brock
Sent: Saturday, October 29, 2005 3:34 PM
To: accessd at databaseadvisors.com
Subject: Re: [AccessD] Array faster in DLL?

Hi Fred

Sounds interesting and in line with the comments from Mr. PowerBasic
(Stuart).

By the way, how did your brother-in-law write the Assembler version? With a
tool of some sort or directly?
Are you saying he obtained a 50:1 improvement in total compared to VB?
I could probably handle PowerBasic without much trouble, but Assembler is
far away ...

/gustav

>>> fahooper at trapo.com 29-10-2005 00:09 >>>
My brother-in-law, who develops in VB6, has told me that writing his DLL's
in PowerBasic gave him a 10:1 speed improvement. Then, for a couple of
critical ones, he moved to Assembler for another 5:1.

-----Original Message-----
From: accessd-bounces at databaseadvisors.com 
[mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Gustav Brock
Sent: Friday, October 28, 2005 9:30 AM
To: accessd at databaseadvisors.com 
Subject: [AccessD] Array faster in DLL?

Hi all

I have some routines that manipulate data in and between some arrays. 
The arrays are not large but they are recalculated about 3 mio. times which
runs on my machine to 90 seconds.

I was wondering if there would be any significant speed increase by moving
these routines to a DLL. I have no experience in writing such libraries but
guess I could find as the routines are uncomplicated. Variables are Long
mostly, only one Single. 
It would take me some time to program these, of course, and if the speed
increase only could be expected to be, say, 30%, it wouldn't hardly be worth
it.

Does anyone (Drew, Stuart?) have experience about what to expect?

/gustav


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