Why do Soft Assertions use Proxies underneath?

[tedyoung]

I've been focusing on reducing the runtime of tests and I've noticed that using Soft Assertions slows tests down because of their use of proxying (I know 800ms might not be a long time, but when all of my tests run in under 1500ms, that 800ms is significant). I haven't looked deeply into the code (yet), but I'm wondering what in the design requires the proxies?

[scordio]

To get soft assertions, the "hard" assertion implementations are reused and proxied via ByteBuddy. However, this happens at runtime.

We do have #2563 about performance improvements, where we might be able to generate all the proxies at build time via the byte-buddy-maven-plugin, but we haven't had the chance to look at it yet.

Depending on the use case, satisfies(Consumer...) might be an alternative to achieve better performance for the execution of multiple assertions.

[joel-costigliola]

Yep, code generation would be nice.