https://github.com/rburgst/spring-boot-jpa-kotlin-slow

demo repo showing slow integration tests with spring-boot and kotlin/hibernate/liquibase
https://github.com/rburgst/spring-boot-jpa-kotlin-slow

Last synced: 2 days ago
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demo repo showing slow integration tests with spring-boot and kotlin/hibernate/liquibase

• Host: GitHub
• URL: https://github.com/rburgst/spring-boot-jpa-kotlin-slow
• Owner: rburgst
• Created: 2019-05-17T08:34:50.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-05-17T08:35:40.000Z (over 5 years ago)
• Last Synced: 2024-11-08T17:53:07.176Z (about 2 months ago)
• Language: Kotlin
• Size: 55.7 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# JPA Kotlin Sample

This sample illustrates slow performance for integration

tests in combination with

* kotlin

* jpa (hibernate)

* liquibase

* spring-data

On a reasonably recent MacBook Pro (Core i7, encrypted SSD) 

the runtime of the test is approx 10s, even though 

there is only a single entity and not much else.

## How to run and time

The goal of this exercise is to get the runtime of 

`JpaDemoApplicationTests.contextLoads` as fast as possible.

Dont rely on the runtime shown in IntelliJ, but simply take the timestamp

of the first and last log line and calculate the duration.

 

## Things to try to improve performance

* Use the following flags in the run config

    

    VM Arguments

    

    ```bash

    -noverify -XX:TieredStopAtLevel=1

    ```

    

    gets it down to approx 7s

    

* run with openj9

    did not really move the needle

* use `@EnableJpaRepositories(...bootstrapMode = BootstrapMode.LAZY)`

    no change in test time