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Date: Tue, 10 Feb 2015 13:56:22 +0400
Message-ID: <CA+9eiLukZ94U-i_6WcqLDTSjcc2C=pZB=hL1ieWE8tEufT=oSA@mail.gmail.com>
To: Matt Ficken <themattficken@gmail.com>
Cc: Pierre Joye <pierre.php@gmail.com>, Lars Strojny <lars@strojny.net>, 
	PHP internals <internals@lists.php.net>, Andrea Faulds <ajf@ajf.me>, Matteo Beccati <php@beccati.com>
Content-Type: multipart/alternative; boundary=089e0115fd0232c0a6050eb8e63a
Subject: Re: [PHP-DEV] [VOTE] Scalar Type Hints
From: dmitry@zend.com (Dmitry Stogov)

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If you measure performance impact using CPU performance counters (VTune,
oprofile, perf) or even better CPU emulator (callgrind) you'll see slight
degradation. It's also clear that it makes some degradation from code
review. 1% difference is invisible because measurement mistake is usually
bigger and also performance may change from build to build because of
different code layout.

Anyway, this is not a stopper, just an issue that would be great to fix.

Thanks. Dmtiry.

On Tue, Feb 10, 2015 at 11:09 AM, Matt Ficken <themattficken@gmail.com>
wrote:

> FYI, the patch doesn't cause a performance regression.
>
> I built on and tested with IIS/Windows. Performance remains the same for
> Wordpress, Symfony and Joomla. Mediawiki actually increased slightly (5%),
> so performance is increase/decrease is not an issue here, the language and
> engine are.
>
>
> If you're interested, see:
>
> http://windows.php.net/downloads/snaps/ostc/pftt/perf/results-20150209-master_rcaf5521-scalar_type_hints_2_strict_mode-8436.html
>
>
> Regards
> -M
>
>
> On Mon, Feb 9, 2015 at 6:43 PM, Pierre Joye <pierre.php@gmail.com> wrote:
>
> > On Feb 10, 2015 1:22 AM, "Lars Strojny" <lars@strojny.net> wrote:
> > >
> > > Hi Matteo,
> > >
> > > sorry for the late response.
> > >
> > > > On 07 Feb 2015, at 12:46, Matteo Beccati <php@beccati.com> wrote:
> > > >
> > > > Maybe it's just me, but I didn't quite understand the point you are
> > making here. Are you saying that declares are more or less like ini
> > settings?
> > >
> > > Yes, exactly that. The new declare()-statement will fundamentally
> change
> > how the engine behaves and one will have two learn more or less two
> flavors
> > of PHP. Even worse I am forced to use the PHP flavor the person picked
> who
> > changed the declare() statement last.
> >
> > No. You are not.
> >
> > > cu,
> > > Lars
> >
>

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