It has always been my understanding that in/out is faster as PHP does not
have to evalutate the terms for variables. The best test would be to use an
app like apache bench (aka: ab) against the two pages. Like this:
Test 1
-------
<?php
$var=array(1,2,3,4,5);
for($x=0;$x<100;$x++){
echo "Hello";
}
$var2=array(6,7,8,9,10);
?>
results:
---------
This is ApacheBench, Version 1.3c <$Revision: 1.45 $> apache-1.3
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2000 The Apache Group, http://www.apache.org/
Server Software: Apache/1.3.20
Server Hostname: phorum.org
Server Port: 80
Document Path: /~brian/test.php
Document Length: 500 bytes
Concurrency Level: 3
Time taken for tests: 0.523 seconds
Complete requests: 100
Failed requests: 0
Total transferred: 67830 bytes
HTML transferred: 51000 bytes
Requests per second: 191.20
Transfer rate: 129.69 kb/s received
Connnection Times (ms)
min avg max
Connect: 1 4 8
Processing: 12 9 7
Total: 13 13 15
Test 2
-------
<?php
$var=array(1,2,3,4,5);
for($x=0;$x<100;$x++){
?>Hello<?php
}
$var2=array(6,7,8,9,10);
?>
results:
---------
This is ApacheBench, Version 1.3c <$Revision: 1.45 $> apache-1.3
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2000 The Apache Group, http://www.apache.org/
Server Software: Apache/1.3.20
Server Hostname: phorum.org
Server Port: 80
Document Path: /~brian/test1.php
Document Length: 500 bytes
Concurrency Level: 3
Time taken for tests: 0.515 seconds
Complete requests: 100
Failed requests: 0
Total transferred: 67830 bytes
HTML transferred: 51000 bytes
Requests per second: 194.17
Transfer rate: 131.71 kb/s received
Connnection Times (ms)
min avg max
Connect: 1 4 8
Processing: 11 9 7
Total: 12 13 15
-------------------------------------------
So, as you can see, there is a difference but not that much. Perhaps if you
were echoing an entire page it would make a large difference. You should
read Nathan Wallace's paper "PHP: Hackers Paradise Revisited"
http://www.e-gineer.com/articles/php-hackers-paradise-revisited.phtml. In
it he talks about speed of coding and not speed of code. Take it with a
grain of salt but it is true. Sometimes it is more important how long it
takes to code something than it is how fast it runs. PHP makes it easy to
code fast while making sure the code runs fast enough.
Brian.
----- Original Message -----
From: "Andre Nęss" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, October 28, 2001 6:11 PM
Subject: [PHP-DEV] Echo vs in/out
I'm currently in the middle of a discussion with some fellow PHP
developers regarding the speed of what we call in/out compared to
echo. With in/out we mean stuff like this:
// php code
?>
<html>some html</html>
<?php
// more php
The manual states that PHP treats ?><?php as an echo statement, and I
don't think there can be any speed difference between the two, however one
of my fellow developers thinks there is a difference, and created a test
which showed a 60% speed difference (using a for loop that ran 10000
times). The test was badly executed IMO, so I ran my own which showed
virtually no difference, but rather than getting into a flame-war I
thought I'd just ask here for a quick answer. Is there a difference, and
if so, is it significant?
Regards
André Nęss
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