Re: Possible RFC: $_SERVER['REQUEST_TIME_FLOAT']

On Wed, 12 Apr 2023 at 11:01, Herbert Groot Jebbink < herbert@groot.jebbink.nl> wrote: > > I'm in the process of using hrtime(true) instead of microtime(true), for > this it would be great if REQUEST_TIME_HR would also exist next to > REQUEST_TIME and REQUEST_TIME_FLOAT Hi :) The idea sounds reasonable on the face of it. Are there any performance issues calling hrtime on every request (possibly platform-specific)? I note that the existing values are not fetched directly from a time source, but have some logic for SAPIs to provide a value [1] e.g. from the Apache request context [2], and then REQUEST_TIME is just REQUEST_TIME_FLOAT truncated to integer. Should the same approach happen here? e.g. should all three values be based on hrtime if the SAPI does not provide a value? Would we even need an extra value if REQUEST_TIME_FLOAT had enough precision? [1] https://heap.space/xref/php-src/main/SAPI.c?r=9d5f2f13#1085 [2] https://heap.space/xref/php-src/sapi/apache2handler/sapi_apache2.c?r=4da0da7f#371 Regards, -- Rowan Tommins [IMSoP]