Thanks, Randy!
It's funny, but I never actually thought of using POSE directly for profiling. I've
been timing everything by counting ticks from
within the code.
I will look into using POSE profiling.
- Jeff
Randy Maxwell wrote:
> Jeff,
>
> POSE provides a REALLY good way to answer your question.
> Just prototype the 2 different variants and run a Profile session on each.
>
> Details (down to clock cycles) are captured about both application AND Palm
> OS code time used.
>
> We have used profiling to optimize implementations with good results.
> Then we viewed the profiling results on a MAC.
> POSE profiling gave us insights into better combinations of Palm OS APIs to
> use that are
> difficult to get using any other approaches I am aware of.
> This has allowed our applications to run pretty well on Palm OS 2.0 and up.
>
> Reading about POSE profiling/searching the POSE forum should help...
>
> I can't give you any info about Features performance as our apps do not use
> them.
>
> Regards,
> Randy Maxwell
>
> -----Original Message-----
> From: DIAMOND JEFF [mailto:[EMAIL PROTECTED]]
> Sent: Friday, January 26, 2001 10:07 AM
> To: Palm Developer Forum
> Subject: Databse access performance...
>
> I didn't get replies to my previous question on this subject.
>
> I'm trying to decide in designing a project whether to use feature
> memory or a database for a commonly accessed buffer.
>
> I'd like to know what kind of things the PalmOS actually does internally
> when you do GetRecord / MemHandleLock / MemHandleUnlock / Release Record
> to get a sense of just how slow the process really is.
>
> I'm specifically wondering if there is any "searching" done in the
> process, or any vector traps / processor state changes, etc, which would
> be much slower than a few ifs, branches, and dereferences.
>
> True, I could just apply to receive the actual PalmOS source code, but I
> don't really need that level of detail. :)
>
> Thanks for the insight!
> - Jeff
>
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