xml loading speedup

[linas@linas.org]

It's been rumoured that James LewisMoss said:

...


Jim, 

while you're looking at this stuff, could you see if there is some
sax call or libxml thingy that allows you to parse xml data coming 
from a pipe rather than from a file?  (or maybe parse data that's
sitting in memory e.g. because it's been read from a pipe?)

Also, can you look at what it would take to support 'incremental'
xml i/o?  By this I mean: assume gnucash is running an already
has hundreds of accounts and thousads of transactions loaded.  
I want to give you an XML snippet, with maybe one or two transactions,
and have you merge that into the existing data ...

How hard would tis be?  Can you do it easily?


--linas