kenota / dropwizard-perf-issue

Dropwizard 0.8.0-rc4 hibernate performance degradation issue

Performance drop from 12k req/sec to 2.2 req/sec.

This repository contains code to demonstrate performance degradation while using hibernate when switching from 0.7.1 dropwizard version to 0.8.0-rc4.

Code is simple app which has 1 resource fetching list of DB entries via Hibernate.

Steps to reproduce:

1. git clone [e-mail]:kenota/dropwizard-perf-issue.git
2. cd dropwizard-perf-issue
3. gradle singleJar
4. java -jar ./build/libs/app.jar server hello-world.yml > /dev/null

At this point you should run some benchmark, against http://localhost:8080/video-hibernate URL. I was able to achieve 12k req/sec using 50 threads on my MacbookPro.

6. Ctrl+C to stop the running app
7. Uncomment dropwizardVersion = "0.8.0-rc4" line in build.gradle and comment out dropwizardVersion = "0.7.1"
8. gradle singleJar
9. java -jar ./build/libs/app.jar server hello-world.yml > /dev/null

Run benchmark again. At this point, I was able to get only 2.2k req/sec using same 50 threads.