On Wed, Apr 12, 2023 at 4:04 PM Rowan Tommins <rowan.coll...@gmail.com> wrote:
> On Wed, 12 Apr 2023 at 13:25, Herbert Groot Jebbink < > herb...@groot.jebbink.nl> wrote: > >> fallback for REQUEST_TIME and REQUEST_TIME_FLOAT to hrtime seems not >> possible, hrtime is not based on the actual time, hrtime can be used to >> calculate a duration or so, not to retrieve the actual time itself. >> > > Fair enough, but that makes my first question all the more important: are > there any situations or platforms where generating an hrtime value for > every request would have a performance penalty? > > How does that performance (for everyone) compare with a single call to > microtime(true) in your application to calculate the duration from > REQUEST_TIME_FLOAT to start of profiling, with all subsequent profiling > using hrtime? > Is it every request? or at the first reference to the $_SERVER super global ? But yeah, of course everything new thing does have a performance penalty
