Hi, My company is thinking about using DeltaSpike Data. But before we integrate this into our development I was asked to prepare some benchmarks, comparing the usage of DeltaSpike Data with the usage of a plain EntityManager. I prepared some benchmarks and I was surprised that there is a big difference in the write performance. I already got some hints in the delta spike irc channel, but the performance is still bad. Based on a template from os890 I implemented my tests and prepared a github project. https://github.com/johannesschaefer/javaee_jsf_cdi_jpa_data_ds_project_template Basically I'm talking about this test: https://github.com/johannesschaefer/javaee_jsf_cdi_jpa_data_ds_project_template/blob/master/src/test/java/de/psi/metals/futurelab/repo/benchmark/SaveTest.java
It just saves an entity into a DB in a loop. Depending of the number of iterations the difference is quite big. SaveTest _____________________________________________________________________________________________________________________________________________________ | | iter 10 | iter 20 | iter 40 | iter 80 | iter 160 | iter 320 | iter 640 | iter 1280 | iter 2560 | iter 5120 | iter 10240 | |====================================================================================================================================================| | DS| 0.004911746| 0.03597043 | 0.015765787| 0.016966639| 0.043319612| 0.281807839| 1.308948835| 1.370535533| 8.186996818| 20.920141274| 93.631768475| | EM| 0.004557839| 0.003256631| 0.005775416| 0.004834958| 0.028243393| 0.035484616| 0.038600595| 0.088904458| 0.339158674| 0.745850523 | 0.853543234 | Also the difference between a run with 5120 and 10240 iteration is not just the double amount of time, it is more than 4 times more. Do you have some hints to me what I'm doing wrong there? Regards Johannes
