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Date: Sat, 13 May 2023 08:27:01 +0200
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Subject: Re: [PHP-DEV] Re: Possible RFC: $_SERVER['REQUEST_TIME_FLOAT']
From: herbert@groot.jebbink.nl (Herbert Groot Jebbink)

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On Wed, Apr 12, 2023 at 4:04=E2=80=AFPM Rowan Tommins <rowan.collins@gmail.=
com>
wrote:

> On Wed, 12 Apr 2023 at 13:25, Herbert Groot Jebbink <
> herbert@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

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