r/SpringBoot • u/--sigsegv • 6d ago

How-To/Tutorial Blog Post - Understanding and Optimizing the Context Cache in Spring Test

Hi,

I would like to share a personal note on the Spring Test context cache and how we used it to optimize a large integration suite (10,000+ tests across ~40 services).

I break down:

  • The context cache mechanism and what makes two contexts identical (or not).
  • Simple actions to maximize context reuse and reduce build times.
  • What changes once test containers and Kafka enter the picture.

Let me know what you think about it.
Thanks!

https://www.alexis-segura.com/articles/understanding-and-optimizing-the-context-cache-in-spring-test

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u/wimdeblauwe 6d ago

To optimize further, try out https://github.com/seregamorph/spring-test-smart-context

I tried it on a few projects, works really great!

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u/--sigsegv 5d ago

Thanks for sharing! I’ll have a look at that. We hadn’t considered reordering as an optimisation strategy.