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Date: Tue, 10 Feb 2015 17:07:56 +0700
Message-ID: <CAEZPtU4DX5sv-WTbA6mHe4uOTxyP6PKQoPjmyqqP_TwfU4qoXA@mail.gmail.com>
To: Dmitry Stogov <dmitry@zend.com>
Cc: Matt Ficken <themattficken@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: text/plain; charset=UTF-8
Subject: Re: [PHP-DEV] [VOTE] Scalar Type Hints
From: pierre.php@gmail.com (Pierre Joye)

On Tue, Feb 10, 2015 at 4:56 PM, Dmitry Stogov <dmitry@zend.com> wrote:
> 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.

At the application level the impact is not relevant.


> Anyway, this is not a stopper, just an issue that would be great to fix.

Full ack. And I would really love to see  the same kindness for this
RFC and the unsolved issues it may have than the one we had for phpng.

This RFC also remembers how critical it is to have a two phases RFC
for such complex tasks. It is demoralizing and a waste of time to do
things as we do now, for such huge thing.

Cheers,
Pierre