performance, gscanner.c and XML reads

["ANDREW MARLOW, BLOOMBERG/ LONDON OF" <AMARLOW1 bloomberg net>]

I have a large XML file and it takes quite a long time
for gscanner to read it. Using quantify shows that
several calls to read are made. I wonder if things can
be sped up by allowing the caller to specify the
buffer size used for read? Currently this is set
by a macro in gscanner.c to 4000 bytes.
I would like to use a larger value when I am
using a larger XML file. Any thoughts?

Regards,

Andrew Marlow