I've created a trace system to use with WordPress where I insert update_usermeta() calls into the code and then look at the user meta data in phpMyAdmin for user 1. So here's what the code looks like:
And here's the trace:
The PHP time() function I'm using is documented to bring back seconds since 1970, but it seems here to be bringing back microseconds since it certainly didn't take 185 seconds to get from line 420 to 421 of the code. Does anyone know what's going on?