[openvrml-develop] Re: Doc2 - adding big buffer

[Damian M. <da...@er...>]

On Sun, 23 Dec 2001, Damian McGuckin wrote:

> I need to increase the speed of loading big, multi-megabyte VRML files.

The change was a lot simpler than what I had tried in the first place.

I changed the size of the buffer declared in doc2 to 65535 and achieved
nearly a factor of two performance gain on big files.  The load time went
from 44 seconds down to 24 on a 1000Mhz Pentium over a 100Mbit/sec
network.

Not as much as I had hoped but better than nothing.

I tried to profile this under LINUX but to no avail.  I compiled it with
a '-p' flag and it core dumped.  Took out the '-p' and it worked.  Looks
like it is more the profiling rather than anything else.

Anybody got ideas on where to target performance problems?

I need to get the scene complexity down a bit in these big files.  I saw
something called Chisel and Vorlon.  Do they do anything?

Has anybody considered having precompiled VRML files which are loaded
directly?

Happy Christmas - Damian (McGuckin)

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