Anatoliy Balakirev ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5c62d60... ) *created* an issue Hibernate Validator ( https://hibernate.atlassian.net/browse/HV?atlOrigin=eyJpIjoiYzJmM2FiMWUyZ... ) / Bug ( https://hibernate.atlassian.net/browse/HV-1933?atlOrigin=eyJpIjoiYzJmM2Fi... ) HV-1933 ( https://hibernate.atlassian.net/browse/HV-1933?atlOrigin=eyJpIjoiYzJmM2Fi... ) Performance issue for validating list with 20k elements ( https://hibernate.atlassian.net/browse/HV-1933?atlOrigin=eyJpIjoiYzJmM2Fi... ) Issue Type: Bug Affects Versions: 8.0.0.Final Assignee: Unassigned Components: performance, validators Created: 10/Jan/2023 06:29 AM Priority: Major Reporter: Anatoliy Balakirev ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5c62d60... ) 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 ( 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 clean test Or this on Windows: ./mvnw.cmd clean test And you’ll see these logs: 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 Which are basically about running three tests: * endpoint_with_explicit_validation - validation is done with manually written method * endpoint_with_validation - validation is done using Hibernate Validator * endpoint_without_validation - no validation at all If you want to see what exactly is being validated - uncomment this line: https://github.com/anatoliy-balakirev/hibernate_validator_performance_iss... ( https://github.com/anatoliy-balakirev/hibernate_validator_performance_iss... ) 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. ( https://hibernate.atlassian.net/browse/HV-1933#add-comment?atlOrigin=eyJp... ) Add Comment ( https://hibernate.atlassian.net/browse/HV-1933#add-comment?atlOrigin=eyJp... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100213- sha1:cca7326 )