Re: [hibernate-dev] Optimizing reflection optimization
Hi,
My measurements have indicated that there is a performance gain. I have
measured the time spent in setPropertyValues and getPropertyValues.
The optimized version was 4 times faster in these methods giving an
estimated application performance increase of about 3%.
Optimizing getPropertyValue and setPropertyValue could give 1.5% more
according to our rough calculations.
Kirill
26 мая 2010 г. 23:53 пользователь Emmanuel Bernard
<emmanuel(a)hibernate.xn--org>-8fga3f8au1a3a:
Hi,
Have you noticed a perf difference in your application with and without the
patch?
I am wondering if modern VMs have catched up with what Javassist does.
On 26 mai 2010, at 18:29, Кирилл Кленский wrote:
> 1. I have noticed that
> org.hibernate.bytecode.javassist.BulkAccessorFactory.findAccessors(...)
is
> searching for accessor methods in the optimized entity class only. This
> means that the methods from the superclasses are not visible during
> BulkAccessor creation unless overridden by child classes. By enhancing
the
> algorithm to search down the inheritance tree we could avoid creation of
> redundant methods which increase the code verbosity a lot. In our case
> almost all the entities are inherited from the base classes having the
> common entity properties defined, so the reflection optimization does not
> work for any of them until we override the inherited methods in all the
> child classes. The implementation is trivial, but I have got a ready
> prototype if anybody is interested.