wiremock: Slow response times

Hi. We are seeing slow response time both in local machines and CI, which makes our tests fail in some cases.

I’m attaching a reproducer for a simple test for which I always see response times higher than 500ms and up to 900ms. It just uses the default WireMockServer except for DYNAMIC_PORT. Any chance you can reproduce this? Otherwise, any ideas on what could be causing this for such a simple case?

WireMock version: 2.29.0

Reproducer: reproducer.zip

Java Flight Recorder profiling data: WireMockTest_2021_07_19_130207.jfr.zip

Issue seen in:

• macOs Big Sur with GraalVM CE 21.1.0
• macOs Sierra with OpenJDK 11
• Docker CentOS based image (CI)