The normal response time (GET request) amounts to around 50-100ms, but randomly on average every 10th request takes 1-1.5 seconds.
This is independent from the request library, server or network used, also in Chrome timing tab this behaviour is easily visible.
Jetty version used is 9.4.7.v20170914.
Can I do anything from client side?
Sending 2 requests at the same time or resending one if takes too long has no effect, both will resolve in 1-1.5 seconds.