It's not my benchmark, it's Slim3's :) ...but you're right, it's bogus. I asked on the main appengine group too, and it turns out the low-level benchmark is doing lazy loading. With that fixed, their numbers come out like yours.
I found this one too, which also gets results like yours: http://gaejava.appspot.com/ On Wed, Jun 8, 2011 at 4:44 AM, Erwin Streur <erwin.str...@gmail.com> wrote: > Indeed Dennis's measurements are very suspicious. First you should do > a couple of warming ups on each of the implementations to prevent > pollution like the JDO classpath scan for enhanced classes (which is > one of the reasons for the high initial run). Then do a couple of run > to determine a range of measurements to spot outlyers. your low-level > API 2millis is definately one. > > When I did the measurements I got the following results > low-level: 1150-1550 > Slim3: 1150-1600 > Objectify: 1950-2400 > JDO: 2100-2700 > > These measurements confirm that GAE designed implementations are > faster then the GAE implementation of a generic data access layer > (JDO), but not so extrem as initially posted. > > The initial response using JDO is a known issue and especially low > trafic website should not use it or use the always on feature (maybe > this will change in the new pricing model) > > Regards, > > Erwin > > On Jun 7, 11:00 am, Ian Marshall <ianmarshall...@gmail.com> wrote: > > The low-level API does indeed look very fast. > > > > Just a comment on JDO: repeat runs roughly halve the JDO run time. I > > presume that this is because for repeat runs the JDO persistence > > manager factory has already been constructed. > > > > On Jun 6, 8:44 pm, DennisP <dennisbpeter...@gmail.com> wrote: > > > > > I'm looking at this online demo: > http://slim3demo.appspot.com/performance/ > > > > > Sample run: > > > The number of entities: 10000 > > > low-level API:get: 2 millis > > > Slim3: 2490 millis > > > JDO: 6030 millis > > > > > Is the low-level API really that much faster? > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > google-appengine-java@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
