Hi Fabian,
interesting fact indeed. What alternate do you propose ?
Regards
JB
On 08/09/2017 10:46 AM, Fabian Lange wrote:
Hey,
I have new intel on this. A colleague generated a flame graph.
I cannot share the raw svg unfortunately, but I cropped the Feature JAXB
parsing.
It is about 25% of the overall startup time just to boot up the jaxb
infrastructure.
Fabian
On Fri, Jul 22, 2016 at 10:06 AM, Fabian Lange <[email protected]
<mailto:[email protected]>> wrote:
Thanks, good hint.
For those inclined to understand my request, attached is the output of
-XX:+TraceClassLoading
Using the xml binding feature approximately loads 800 classes (which
represent about 5MB memory)
I haven't checked alternatives to the jaxb. And I am aware that this is a
more esoteric requirement to reduce footprint.
However, I am sure if this would not be from the JDK, nobody would pull in a
5MB dependency to parse a single xml file.
Fabian
On Fri, Jul 22, 2016 at 9:25 AM, Guillaume Nodet <[email protected]
<mailto:[email protected]>> wrote:
Note that on older branches, the feature repositories are still parsed
using DOM
https://github.com/apache/karaf/blob/karaf-2.x/features/core/src/main/java/org/apache/karaf/features/internal/RepositoryImpl.java
<https://github.com/apache/karaf/blob/karaf-2.x/features/core/src/main/java/org/apache/karaf/features/internal/RepositoryImpl.java>
The xml is now also written, that may be the reason why we switched.
2016-07-14 23:11 GMT+02:00 Fabian Lange <[email protected]
<mailto:[email protected]>>:
> Hi,
>
> i am looking into ways to trim down Karaf. I notices that Karaf uses
JaxB
> to parse features.xml - However this is the only application of JaxB.
>
> Could somebody more involved help me to figure out if it is worth to
> replace it with manual marshalling? I assume other xmls are parsed
> differently?
> Advantage would be that the whole jaxb infrastructure could be
avoided,
> including the contexts.
>
> I know manual parsing is a pain, but anyway, just wanted to throw
this out,
> maybe somebody has a good suggestion.
>
> Fabian
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Guillaume Nodet
------------------------
Red Hat, Open Source Integration
Email: [email protected] <mailto:[email protected]>
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Blog: http://gnodet.blogspot.com/
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