Thank you@xabbuh.

@xabbuh just an observation; looking back at the linked PRs, the original motivation appears to be an optimization as PHP used to skip theusleep(1) if more entropy was set to true. As of PHP 7.2, the function appears to always wait until the next microsecond using a do..while. So if the primary motivation is still performance, and more entropy isn't actually required, itshould be less CPU cycles to not have more entropy.

Ref:https://github.com/php/php-src/blob/master/ext/standard/uniqid.c

@natewiebe13 Thank you for the hint. I wasn't aware of it, but this was indeed improved inphp/php-src@d25049c.