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Posted to fop-users@xmlgraphics.apache.org by Peter <p....@arenae.ch> on 2014/05/13 12:18:11 UTC
Drastic Performance Improvement by dropping xerces and xalan
We had some performance problems with fop and began to investigate. For a
specific example document of about 400 pages fop took about 55 seconds on a
server at a client. The same process was much faster in our own setting
(taking about 11 seconds). What we found out is the following:
- fop from the distribution (either 1.1 release or 1.2 snapshot) takes 55
seconds
- fop from the suse package takes only 11 seconds
The two configurations differ in the jars: The suse config does not include
xercesImpl, xalan and serializer
We are running
java version "1.7.0_40"
OpenJDK Runtime Environment (IcedTea 2.4.1) (suse-8.18.1-x86_64)
OpenJDK 64-Bit Server VM (build 24.0-b50, mixed mode)
So, removing these three libraries drastically improved performance for us.
Can someone explain why this is so? Can I safely drop these jars?
Best regards
Peter
--
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Re: Drastic Performance Improvement by dropping xerces and xalan
Posted by Peter <p....@arenae.ch>.
As you both suspected, the performance difference is related to the
stylesheet transformation. We have now found the origin: It was a
<xsl:for-each> with a "//..." selector. When we change it to something
better (in our case /*/... was the better expression) the performance of the
jdk xalan and the one shipped with fop was the same.
Peter
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Re: Drastic Performance Improvement by dropping xerces and xalan
Posted by Pascal Sancho <ps...@gmail.com>.
Hi,
-xsl and -xml command line parameters are there for convenience.
FOP delegates XSLT transformation to Xalan before do its own job:
render pdf (or whatever supported format).
You can do the XSLT transformation by yourself, using whatever XSLT
processor you want, and feed FOP with resulting XSL-FO.
That can be done a batch processing.
So, Xalan dependencies (and associated Xerces) can be removed from FOP bundle.
2014-05-14 10:38 GMT+02:00 Peter <p....@arenae.ch>:
> Actually, we are using -xsl and -xml as input.
>
>
> Glenn Adams-2 wrote
>> Personally, I support removing all XSLT functions from FOP, but I'm afraid
>> that would cause many users to find it less useful. I think it was a
>> serious architectural error to combine those functions in the first place,
>> but that horse left the gate long ago.
>>
>>
>> On Tue, May 13, 2014 at 4:18 AM, Peter <
>
>> p.kullmann@
>
>> > wrote:
>>
>>> We had some performance problems with fop and began to investigate. For a
>>> specific example document of about 400 pages fop took about 55 seconds on
>>> a
>>> server at a client. The same process was much faster in our own setting
>>> (taking about 11 seconds). What we found out is the following:
>>>
>>> - fop from the distribution (either 1.1 release or 1.2 snapshot) takes 55
>>> seconds
>>> - fop from the suse package takes only 11 seconds
>>>
>>> The two configurations differ in the jars: The suse config does not
>>> include
>>> xercesImpl, xalan and serializer
>>>
>>> We are running
>>> java version "1.7.0_40"
>>> OpenJDK Runtime Environment (IcedTea 2.4.1) (suse-8.18.1-x86_64)
>>> OpenJDK 64-Bit Server VM (build 24.0-b50, mixed mode)
>>>
>>> So, removing these three libraries drastically improved performance for
>>> us.
>>>
>>> Can someone explain why this is so? Can I safely drop these jars?
--
pascal
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Re: Drastic Performance Improvement by dropping xerces and xalan
Posted by Peter <p....@arenae.ch>.
Actually, we are using -xsl and -xml as input.
Glenn Adams-2 wrote
> Personally, I support removing all XSLT functions from FOP, but I'm afraid
> that would cause many users to find it less useful. I think it was a
> serious architectural error to combine those functions in the first place,
> but that horse left the gate long ago.
>
>
> On Tue, May 13, 2014 at 4:18 AM, Peter <
> p.kullmann@
> > wrote:
>
>> We had some performance problems with fop and began to investigate. For a
>> specific example document of about 400 pages fop took about 55 seconds on
>> a
>> server at a client. The same process was much faster in our own setting
>> (taking about 11 seconds). What we found out is the following:
>>
>> - fop from the distribution (either 1.1 release or 1.2 snapshot) takes 55
>> seconds
>> - fop from the suse package takes only 11 seconds
>>
>> The two configurations differ in the jars: The suse config does not
>> include
>> xercesImpl, xalan and serializer
>>
>> We are running
>> java version "1.7.0_40"
>> OpenJDK Runtime Environment (IcedTea 2.4.1) (suse-8.18.1-x86_64)
>> OpenJDK 64-Bit Server VM (build 24.0-b50, mixed mode)
>>
>> So, removing these three libraries drastically improved performance for
>> us.
>>
>> Can someone explain why this is so? Can I safely drop these jars?
>>
>> Best regards
>> Peter
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://apache-fop.1065347.n5.nabble.com/Drastic-Performance-Improvement-by-dropping-xerces-and-xalan-tp40586.html
>> Sent from the FOP - Users mailing list archive at Nabble.com.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail:
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>>
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Re: Drastic Performance Improvement by dropping xerces and xalan
Posted by Glenn Adams <gl...@skynav.com>.
Personally, I support removing all XSLT functions from FOP, but I'm afraid
that would cause many users to find it less useful. I think it was a
serious architectural error to combine those functions in the first place,
but that horse left the gate long ago.
On Tue, May 13, 2014 at 4:18 AM, Peter <p....@arenae.ch> wrote:
> We had some performance problems with fop and began to investigate. For a
> specific example document of about 400 pages fop took about 55 seconds on a
> server at a client. The same process was much faster in our own setting
> (taking about 11 seconds). What we found out is the following:
>
> - fop from the distribution (either 1.1 release or 1.2 snapshot) takes 55
> seconds
> - fop from the suse package takes only 11 seconds
>
> The two configurations differ in the jars: The suse config does not include
> xercesImpl, xalan and serializer
>
> We are running
> java version "1.7.0_40"
> OpenJDK Runtime Environment (IcedTea 2.4.1) (suse-8.18.1-x86_64)
> OpenJDK 64-Bit Server VM (build 24.0-b50, mixed mode)
>
> So, removing these three libraries drastically improved performance for us.
>
> Can someone explain why this is so? Can I safely drop these jars?
>
> Best regards
> Peter
>
>
>
>
> --
> View this message in context:
> http://apache-fop.1065347.n5.nabble.com/Drastic-Performance-Improvement-by-dropping-xerces-and-xalan-tp40586.html
> Sent from the FOP - Users mailing list archive at Nabble.com.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: fop-users-unsubscribe@xmlgraphics.apache.org
> For additional commands, e-mail: fop-users-help@xmlgraphics.apache.org
>
>