Zrok controller with --verbose

zrok controller /opt/openziti/etc/zrok/ctrl.yml --verbose 

[   0.058]    INFO zrok/controller.Run: created new agent controller
[   0.058]    INFO zrok/controller.inspectZiti: inspecting ziti controller configuration
[   0.256]    INFO zrok/controller.findZrokProxyConfigType: found 'zrok.proxy.v1' config type with ID
[   0.590]    INFO zrok/controller/store.Open: database connected
[   0.601]    INFO zrok/controller.(*maintenanceResetPasswordAgent).run: started
[   0.601]    INFO zrok/controller.(*maintenanceRegistrationAgent).run: started
[   0.603]    INFO zrok/rest_server_zrok.(*Server).Logf: Serving zrok at https://[::]:N


curl to api/v1/overview takes more than 4 seconds on localhost. I would like to understand where the problem is.

How to start controller in DEBUG mode?