Terrific performance when using SSL also general perf. problems when http.cache is enabled

[Daniel Fraknoy]

When using SSL termination the whole application suffers a major slowdown.
It's not a CPU peak instead it simply makes the request hang for seconds before it completes the request. This can be mitigated by switching off the entire cache, but still occasional slowliness occurs.
We run multiple versions on 14.04 most of them are self compiled 5.3.2 versions and one with an old PPA (https://launchpad.net/~apache-helpdesk/+archive/ubuntu/trafficserver-ppa) none of those are showing these symptoms with the same config settings.
They run as standalone proxies no clustering used.