On 27 avr. 2012, at 17:37, Emmanuel Lécharny wrote: > Hi guys, > > so this is the end of the week, and I have done some experiments with my > Index branch (this branch has been created to remove the oneLevel and > subLevel index, and to use the RdnIndex instead). > > First of all, the server is working just fine without those two indexes. I > still have on-going improvements to get the full advantage of those removal > (currently, we have some issues with JDBM when we want to update the keys to > stoe the number of children/descendant each entry has, but this is something > we are discussing atm), but baseline, the perfs are pretty much on par with > trunks. > > That includes searches, not only modifications. > > Today, I did some profiling with the latest version of Yourkit, and I was > able to tweak the server here and there to get some speed improvement. Here > are the results I get : > > on Trunk : > > OBJECT level search, 19 680 entries returned per second (we only get one > entry) > ONE level search, 27 900 entries returned per second (we get five entries) > SUBTREE level search, 17870 entries returned per second (we get 10 entries) > > Keep in mind that those tests are done with an embedded server, it does not > go through any network layer. So to speak, it gives the raw caacity of the > server to deliver entries, no more. > > On the branch now : > OBJECT level search, 33 373 entries returned per second (we only get one > entry) : this is a 70% improvement ! > ONE level search, 45 695 entries returned per second (we get five entries): > this is a 63% improvement ! > SUBTREE level search, 35 300 entries returned per second (we get 10 entries): > this is a 97% improvement !!!
Wow. Awesome… Congratulations! > I'm quite confident that we can still improve the performances of the server, > I have just scratched the surface here :) > > More to come soon ! More… More… More… ;) Regards, Pierre-Arnaud > > -- > Regards, > Cordialement, > Emmanuel Lécharny > www.iktek.com >
