Hi Jean Georges,
Firstly, does the document you are parsing contain a DTD or schema
reference? If it uses http://acme.com/xyz.dtd, then much of your parsing
time may actually be in retrieval of the remote dtd. And if the
dtd/schema is large then time will be spent processing it. If this is
the case, there are optimisations available for both these problems.
Secondly, you don't say exactly what you are timing. Is it the complete
application time, or the time taken by the method you include below, or
just the time for the parse method?
Thirdly, you don't mention which version of Xerces you are using...
Providing information on the above would allow people to provide better
suggestions for you..
I certainly see better performance than you do, so there is hope :-)
Regards,
Simon
On Tue, 2003-01-14 at 10:56, Jean Georges PERRIN wrote:
> Hi,
>
> Thanks for those who helped me with cloning...
>
> I am a little surprised with performance. Maybe there are some basic things
> I am doing wrong.
>
> I am parsing a 3 Kb XHTML file and it takes me about 4s, cloning the tree
> takes me roughly a ridiculous amount of time (10ms). This on an Athlon XP
> 1800+ running XP (sure I could switch to Linux but it is not planned for now
> :) ).
>
> My code for parsing:
> protected void load () {
> DOMParser parser;
>
> try {
> parser = new DOMParser();
> }
> catch (Exception e) {
> log.severe ("Error: Unable to instantiate parser");
> return;
> }
>
> try {
> parser.parse(m_file.toURI().toString());
> m_document = parser.getDocument();
> }
> catch (SAXParseException e) {
> // ignore
> }
> catch (Exception e) {
> String msg;
> msg = ("Error: Parse error occurred, " + e.getMessage());
> if (e instanceof SAXException) {
> e = ((SAXException)e).getException();
> }
> msg += '\n' + e.toString();
> log.severe (msg);
> }
> }
>
> Questions:
> 1/ is static'ing my parser will enhance the process?
> 2/ can I "pre" create some objects I can reuse?
> 3/ are there some eventual verification I can turn off?
>
> My code for cloning:
> public Object clone() {
> XHTML11Window win = new XHTML11Window(m_file);
> win.m_document = new DocumentImpl();
> win.m_document.importNode(m_document.getDocumentElement(), true);
>
> return win;
> }
>
> I haven't checked that they really were cloned, but it looks as if they
> were...
>
> Any tips are more than welcome!
>
> Jean Georges PERRIN
>
>
>
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