Message Title

We have a PUT REST endpoint, which accepts an autogenerated object, which is in fact a list of objects. We send a request there, which contains around 23k of elements. Elements in that list have a couple of concrete implementations, each has a couple of required fields and a list with a couple more elements of the same type. When hibernate validator is enabled on that endpoint - it takes somewhere between 30 and 50 seconds to validate everything. When I replace that validation with manually written methods - it takes around 0.5 seconds to validate the same. The sample project to reproduce this is here: https://github.com/anatoliy-balakirev/hibernate_validator_performance_issue

If you are on Linux, just run the following command in the root of the project (make sure your JAVA_HOME points to Java 17):

./mvnw.cmd clean test

2023-01-10T15:17:32.316+01:00  INFO 18248 --- [           main] com.example.demo.DemoControllerTest      : Sending '/endpoint_with_explicit_validation' request...
2023-01-10T15:17:32.643+01:00  INFO 18248 --- [o-auto-1-exec-1] com.example.demo.DemoFilter              : Got into filter
2023-01-10T15:17:33.419+01:00  INFO 18248 --- [o-auto-1-exec-1] com.example.demo.DemoController          : Got into the controller with explicit validation, amount of elements in the request: 23489
2023-01-10T15:17:33.503+01:00  INFO 18248 --- [           main] com.example.demo.DemoControllerTest      : It took 1187ms to execute the '/endpoint_with_explicit_validation' request

2023-01-10T15:17:33.572+01:00  INFO 18248 --- [           main] com.example.demo.DemoControllerTest      : Sending '/endpoint_with_validation' request...
2023-01-10T15:17:33.607+01:00  INFO 18248 --- [o-auto-1-exec-2] com.example.demo.DemoFilter              : Got into filter
2023-01-10T15:18:09.510+01:00  INFO 18248 --- [o-auto-1-exec-2] com.example.demo.DemoController          : Got into the controller with validation, amount of elements in the request: 23489
2023-01-10T15:18:09.512+01:00  INFO 18248 --- [           main] com.example.demo.DemoControllerTest      : It took 35940ms to execute the '/endpoint_with_validation' request

2023-01-10T15:18:09.534+01:00  INFO 18248 --- [           main] com.example.demo.DemoControllerTest      : Sending '/endpoint_without_validation' request...
2023-01-10T15:18:09.584+01:00  INFO 18248 --- [o-auto-1-exec-3] com.example.demo.DemoFilter              : Got into filter
2023-01-10T15:18:09.637+01:00  INFO 18248 --- [o-auto-1-exec-3] com.example.demo.DemoController          : Got into the controller without validation, amount of elements in the request: 23489
2023-01-10T15:18:09.638+01:00  INFO 18248 --- [           main] com.example.demo.DemoControllerTest      : It took 104ms to execute the '/endpoint_without_validation' request

I’m using the latest Spring Boot version (3.0.1), Java 17.0.5 (Amazon Corretto) and Maven 3.8.6

P.S. I’m not sure if this should be a Bug or rather an Improvement, so left the default one there.