VTD-XML and FI can be complementary.
The vertical axis is unit-less because it is the multiplying
factor and normalized (with the document size being 1).
DOM is typically 5x~7x; VTD-XML is 1.3x~1.5x. To
VTD-XML, parsing is indexing. XML beans create a
lot of object; VTD-XML doesn't. So VTd-Xml
should hold the edge both in memory and performance...
The best way is to try it...
----- Original Message -----
From: "Mark Swanson" <mark_at_ScheduleWorld.com>
To: <users_at_fi.dev.java.net>
Sent: Thursday, January 19, 2006 10:58 AM
Subject: Re: Non-FI performance problems
> Jimmy Zhang wrote:
>> Have you heard of the latest XML processing models called VTD-XML
>
> I haven't.
> Cursory glance: memory dom vs vtd chart is missing the vertical axis
> definition.
>
> If I understand correctly I think this could complement FI nicely - FI
> would handle the transmission and VTD would provide the in-memory random
> access document facilities.
>
> Random access... that's quite an impressive feat - if the charts are
> accurate. I find the performance a bit too good to be true considering
> that VTD is doing work (indexing) at the same time as reading the stream
> while xpp is purely stream reading. I've been through the xpp code and
> submitted a fix or two so I'm making more than just a guess at this. I'm
> sure this would be explained in the benchmark code.
>
> Random access... my mind is still thinking of the possibilities.
> XmlBeans (or XmL Schema tools like it) might be significantly faster and
> memory efficient for a lot of use cases if the XmlObjects didn't have to
> actually create objects with attributes. Only get/set methods would be
> required. If the random access mechanism was sufficiently fast enough...
>
> Hopefully I haven't misunderstood the VTD/FI connection. Please correct
> me if I misunderstood.
>
> Cheers.
>
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