Hi everyone:
This may well be a stupid question, but I've spend enough time staring
blankly at zend_compile.c/zend_execute.c that I figured it was time to
ask. :)
Say I have a section of code like this:
?php
$s1 = 'foo' . 'bar' . 'baz';
$s2 = 'foobarbaz';
?
In the PHP bytecode (I hope I'm
On Wed, 26 Feb 2003, David Brown wrote:
This may well be a stupid question, but I've spend enough time staring
blankly at zend_compile.c/zend_execute.c that I figured it was time to
ask. :)
Say I have a section of code like this:
?php
$s1 = 'foo' . 'bar' . 'baz';
$s2 = 'foobarbaz';
It's the job of an optimizer, not of a compiler. And because PHP
doesn't
have an internal optimizer, this is not optimized out. You can either
check the ZendOptimiser (I can't show you the opcodes that that
generates) or PEAR::Optimizer, which is in Pecl (which might not do
this
optimization yet
On Wed, Feb 26, 2003 at 05:36:54PM +0100, Derick Rethans wrote:
| No, the engine doesn't do this at compile time. This first one produces:
|
| number of ops: 5
| line # op fetch ext operands
| ---
On Wed, 26 Feb 2003, David Brown wrote:
Okay. Makes complete sense. I was thinking more along the lines of
wouldn't it be nice if...?. I hadn't quite made it to where would
that belong?. :)
I'll check out the optimizers. I noticed that the new CVS version of APC
seems to have a
On Wed, 26 Feb 2003, David Brown wrote:
Is that output a ZEND_DEBUG thing, or is that an external tool?
It's an external tool: VLD from http://www.derickrethans.nl/vld.php
Derick
--
Stop mad cowboy disease!
