On Thu, Jul 23, 2009 at 1:50 PM, Guo Du<mrdu...@gmail.com> wrote: > On Thu, Jul 23, 2009 at 12:37 PM, Bart van der > Schans<b.vandersch...@onehippo.com> wrote: >> Iirc there's a similar problem with multi value properties when you >> add a lot of values. >> >> Is there any room left in the current implementation to improve the >> performance of those two use cases? Or did somebody already look at it >> thoroughly and squeezed out the last bit of performance gain? If not, >> I would be happy to run some tests in a profiler and see what comes >> up.. >> > > By Alex: bundle pm stores nodes + its properties + its list of child > nodes in a compact binary blob. > > This means read a node will load all child reference/properties to > mem, I cannot see it could be improved significantly by bundle pm. > It's possible with other pm store if the child/properties are stored > separately. It could be interesting to just add one table with (id,parent_id) and remove the child node list from the bundle and separate the hierarchical information from the content. But I changing the storage format is a huge change and I don't think it would justify the performance gain.
Bart -- Hippo B.V. - Amsterdam Oosteinde 11, 1017 WT, Amsterdam, +31(0)20-5224466 Hippo USA Inc. - San Francisco 101 H Street, Suite Q, Petaluma CA, 94952-3329, +1 (707) 773-4646 ----------------------------------------------------------------- http://www.onehippo.com - i...@onehippo.com -----------------------------------------------------------------
