It all started when I had some fairly serious visitor numbers drop by “Have I been pwned?” (HIBP) the other day. Actually, it was after this I noticed the above oddity; the CPU kept ramping up disproportionately to the request volume. In fact the request volume could be flat at very low numbers yet the CPU would spiral out of control. I’d restart the app and it would all come good. Something in the code wasn’t playing nice.