Hibernate read every single property of the DOM and use
context/hierarchy a lot. rewriting it in SAX will lead to :
- a *full* rewriting of Binder (not a fast job believe me)
- not sure SAX is faster when you need to read the whole document.
Ara Abrahamian wrote:
1/3rd of the total startup time
: > From: [EMAIL PROTECTED]
:: > [mailto:[EMAIL PROTECTED] On
:: > Behalf Of Gavin King
:: > Sent: Wednesday, April 28, 2004 10:22 PM
:: > To: Ara Abrahamian
:: > Cc: 'hibernate-devel'
:: > Subject: Re: [Hibernate] Startup time
:: >
:: >
:: > That would res
How about using the jakarta commons-digester? I believe it uses SAX, and
it makes your code a LOT more readable :-)
(ps. can someone modify the list settings so that the reply goes to the
list? that'd help a lot ...)
Gavin King wrote:
> That would result in a LOT of really ugly code.
>
> Ar
At best, a LOT of code. Ugliness can be left up to the developer. ;)
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Gavin King
> Sent: Wednesday, April 28, 2004 10:22 PM
> To: Ara Abrahamian
> Cc: 'hibernate-devel&
That would result in a LOT of really ugly code.
Ara Abrahamian wrote:
Perhaps someone could migrate the xml loading stuff to use SAX instead of
dom4j? Dom4j creates lots of objects. In my backup/restore code I saw a 10
times better performance by just using SAX instead of dom4j.
Ara.
-
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Gavin King
Sent: Wednesday, April 28, 2004 2:25 AM
To: Henri Tremblay
Cc: 'hibernate-devel'
Subject: Re: [Hibernate] Startup time
Gavin King wrote:
>>2- Lazy load the conf. I mean, don&#
:: The CGLIB stuff will probably be hard to work around since
:: those objects
:: are not (and probably can't be made) serializable -
:: but we can remove the XML parsing if we can serialize the
:: SessionFactory...but it will probably require us to keep more state
:: around than we did previou
Hi,
like other I also has problems with the start up time.
After a short analysis I saw that Xalan for XMLDatabinder
takes a lot of time.
Special for small projects (less mapping files) the part of XMLDatabinder
is very high.
Could it be usefull to make XMLDatabinder optional?
Kai
-
> > 1/3rd of the total startup time goes to Configuration.addInputStream,
> > nearly completely to dom4j.io.SaxReader.read
Perhaps someone could migrate the xml loading stuff to use SAX instead of
dom4j? Dom4j creates lots of objects. In my backup/restore code I saw a 10
times better performance b
Michael Gloegl wrote:
Hi all,
here are some quick shot results using hprof (I'll do some more
detailed examination as soon as I have OptimizeIt access again):
For testing, I did a simple SessionFactory building on all the
mappings from the Unit tests. (except 4). In the default
configuration,
el'
Subject: RE: [Hibernate] Startup time
I can do that. I'll run it through both JProbe and OptimizeIt...
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
Emmanuel Bernard
Sent: Tuesday, April 27, 2004 8:41 AM
To: Ara Abrahamian
Cc: 'hibernate-
Henri Tremblay wrote:
One other thing that takes time is reflection. I don't know if some calls to
ReflectHelper can be replaced by static code but it would help.
Hum, would be interesting to see if startup is faster when all types are
specified in the mapping.
I guess it would then also be p
I can do that. I'll run it through both JProbe and OptimizeIt...
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
Emmanuel Bernard
Sent: Tuesday, April 27, 2004 8:41 AM
To: Ara Abrahamian
Cc: 'hibernate-devel'
Subject: Re: [Hibernate] St
Hi all,
here are some quick shot results using hprof (I'll do some more detailed
examination as soon as I have OptimizeIt access again):
For testing, I did a simple SessionFactory building on all the mappings
from the Unit tests. (except 4). In the default configuration, the rough
approximatio
ED]>
To: "Ara Abrahamian" <[EMAIL PROTECTED]>
Cc: "'hibernate-devel'" <[EMAIL PROTECTED]>
Sent: Tuesday, April 27, 2004 5:07 PM
Subject: Re: [Hibernate] Startup time
> Theres other problems with lazy compilation, its not doable.
7;Emmanuel Bernard'; Ara Abrahamian
Cc: 'hibernate-devel'
Subject: RE: [Hibernate] Startup time
I can do that. I'll run it through both JProbe and OptimizeIt...
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
Emmanuel Bernard
Sent: Tuesday,
This did not seem to go through the first time around. Here goes again...
-Original Message-
From: Ebersole, Steve
Sent: Tuesday, April 27, 2004 10:05 AM
To: 'Emmanuel Bernard'; Ara Abrahamian
Cc: 'hibernate-devel'
Subject: RE: [Hibernate] Startup time
I can d
Theres other problems with lazy compilation, its not doable.
Ara Abrahamian wrote:
Most probably loading the hbm files and creating metadata objects is the
bottleneck? And the solution is to lazy load them?
Ara.
-Original Message-
From: [EMAIL PROTECTED] [mailto:hibernate-devel-
[EMAI
No this is impossible: we need a second pass compilation. And "from
Object" request the whole mapping to work as expected
Ara Abrahamian wrote:
Most probably loading the hbm files and creating metadata objects is the
bottleneck? And the solution is to lazy load them?
Ara.
-Original Messa
Most probably loading the hbm files and creating metadata objects is the
bottleneck? And the solution is to lazy load them?
Ara.
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:hibernate-devel-
> [EMAIL PROTECTED] On Behalf Of Gavin King
> Sent: Tuesday, April 27, 2004 12:43 PM
> T
Hi,
Max is trying to implement serialization of the SessionFactory, as one
possible solution, but perhaps there is some other way we could optimize
stuff. Does someone want to profile Hibernate startup, and discover
where the slow methods are? At least find out which work is dominating
at star
Use a tool like OptimizeIt or JProbe.
Pure JVM timing is useless due to timer approx.
Michael Gloegl wrote:
Hi,
Max is trying to implement serialization of the SessionFactory, as
one possible solution, but perhaps there is some other way we could
optimize stuff. Does someone want to profile Hib
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