Speed Tests of Zend_Config Approaches
On a project I’m working on we are using bits and pieces from the Zend Framework. We want to utilize the Zend_Config functionality to be able to standardize and make it easier to setup as well as access config information. We also wanted a way to be able to have the config automatically reflect the environment we are running in (production vs testing vs dev).
Our first stab at it was utilizing ini format configs and the Zend_Config_Ini importer. The configs were nice and clean, and had support built in for being environment aware. This also is the approach the documentation seems to be pushing, almost anything that utilizes a config example in the documentation utilizes ini style configs.
A couple thoughts kept creeping into my mind though. Whats the performance of converting ini file into the final config object going to be like? How does it compare to other possible approaches to loading the config object?
Only one way to find out. Time to fire up the PHP Raceway (my little homegrown testing framework for testing out these sort of things). What I did was take the example config from the quick start documentation and added a config section for an array of data, then set up that config for trying out the three different approaches. First is the standard ini way, second is building an array in php then building the config object from that, and third is creating a blank config object and loading it by hand. Here are the racers.
The Racers
The INI approach
Instantiation Code:
Config File:
phpSettings.display_startup_errors = 0
phpSettings.display_errors = 0
bootstrap.path = APPLICATION_PATH "/Bootstrap.php"
bootstrap.class = "Bootstrap"
resources.frontController.controllerDirectory = APPLICATION_PATH "/controllers"
resources.layout.layoutPath = APPLICATION_PATH "/layouts/scripts"
resources.view[] =
resources.db.adapter = "PDO_SQLITE"
resources.db.params.dbname = APPLICATION_PATH "/../data/db/guestbook.db"
testarray[] = "test1"
testarray[] = "test2"
testarray[] = "test3"
testarray[] = "test4"
testarray[] = "test5"
[staging : production]
[testing : production]
phpSettings.display_startup_errors = 1
phpSettings.display_errors = 1
resources.db.params.dbname = APPLICATION_PATH "/../data/db/guestbook-testing.db"
[development : production]
phpSettings.display_startup_errors = 1
phpSettings.display_errors = 1
resources.db.params.dbname = APPLICATION_PATH "/../data/db/guestbook-dev.db"
The PHP Array approach
Instantiation Code:
Config File:
$config = array(
'phpSettings' => array(
'display_startup_errors' => 0,
'phpSettings.display_errors' => 0),
'boostrap' => array(
'path' => APPLICATION_PATH . "/Bootstrap.php",
'class' => "Bootstrap"),
'resources' => array(
'frontController' => array(
'controllerDirectory' => APPLICATION_PATH . "/controllers"),
'layout' => array(
'layoutPath' => APPLICATION_PATH . "/layouts/scripts"),
'view' => array(),
'db' => array(
'adapter' => "PDO_SQLITE",
'params' => array(
'dbname' => APPLICATION_PATH . "/../data/db/guestbook.db"))),
'testarray' => array('test1', 'test2', 'test3', 'test4', 'test5'));
if (APPLICATION_ENVIRONMENT == 'staging') {
} elseif (APPLICATION_ENVIRONMENT == 'teseting') {
$config['phpSettings']['display_startup_errors'] = 1;
$config['phpSettings']['display_errors'] = 1;
$config['resources']['db']['params']['dbname'] = APPLICATION_PATH . "/../data/db/guestbook-testing.db";
return $config;
} elseif (APPLICATION_ENVIRONMENT == 'development') {
$config['phpSettings']['display_startup_errors'] = 1;
$config['phpSettings']['display_errors'] = 1;
$config['resources']['db']['params']['dbname'] = APPLICATION_PATH . "/../data/db/guestbook-testing.db";
return $config;
}
return $config;
The PHP Config Fill approach
Instantiation Code:
require CONFIG_PATH . '/config_fill.php';
$config->setReadOnly();
Config File:
$config->phpSettings = array();
$config->phpSettings->display_startup_errors = 0;
$config->phpSettings->display_errors = 0;
$config->boostrap = array();
$config->boostrap->path = APPLICATION_PATH . "/Bootstrap.php";
$config->boostrap->class = 'Bootstrap';
$config->resources = array();
$config->resources->frontController = array();
$config->resources->frontController->controllerDirectory = APPLICATION_PATH . "/controllers";
$config->resources->layout = array();
$config->resources->layout->layoutPath = APPLICATION_PATH . "/layouts/scripts";
$config->resources->view = array();
$config->resources->db = array();
$config->resources->db->adapter = "PDO_SQLITE";
$config->resources->db->params = array();
$config->resources->db->params->dbname = APPLICATION_PATH . "/../data/db/guestbook.db";
$config->testarray = array('test1', 'test2', 'test3', 'test4', 'test5');
if (APPLICATION_ENVIRONMENT == 'staging') {
} elseif (APPLICATION_ENVIRONMENT == 'teseting') {
$config->phpSettings->display_startup_errors = 1;
$config->phpSettings->display_errors = 1;
$config->resources->db->params->dbname = APPLICATION_PATH . "/../data/db/guestbook-testing.db";
} elseif (APPLICATION_ENVIRONMENT == 'development') {
$config->phpSettings->display_startup_errors = 1;
$config->phpSettings->display_errors = 1;
$config->resources->db->params->dbname = APPLICATION_PATH . "/../data/db/guestbook-testing.db";
}
The results
*times are in seconds*
laps = 10000
PHP Array Config Format is the WINNER!
total time = 2.70539808273
average time = 0.00027054
Ini Config Format results:
total time = 4.37592101097 which is 1.67052292824 slower than the winner
average time = 0.00043759 which is 0.00016705 per lap slower than the winner
this racer took 62% longer than the winner
PHP Config Fill results:
total time = 3.37267208099 which is 0.66727399826 slower than the winner
average time = 0.00033727 which is 6.673E-5 per lap slower than the winner
this racer took 25% longer than the winner
Conclusion
If speed is absolute biggest concern, I’d have to say go with the building of an array and passing it into the constructer. The array aproach made our eyes burn, so we ended up going with the hand filling of the config object because the little bit of performance hit was worth the trade off of and easier to work with and read config file.
One huge thing of note. I run xcache on my systems, and to be honest could not image running a production system without some sort of opcode cacher. If you happen to not have access to an opcode cacher these results will change drastically. Check out what happens when I turn xcache off:
*times are in seconds*
laps = 10000
PHP Array Config Format is the WINNER!
total time = 3.0291249752
average time = 0.00030291
Ini Config Format results:
total time = 4.26868700981 which is 1.23956203461 slower than the winner
average time = 0.00042687 which is 0.00012396 per lap slower than the winner
this racer took 41% longer than the winner
PHP Config Fill results:
total time = 4.76278781891 which is 1.7336628437 slower than the winner
average time = 0.00047628 which is 0.00017337 per lap slower than the winner
this racer took 58% longer than the winner
If you you’re not running an opcode cacher looks like you had better steer clear of the hand filling approach and go with the array for speed or ini for maintainability.
In the end this sort of micro-optimization may not gain you much in terms of noticeable real world performance, especially when you compare this to the cost of database or api queries. But if you’re a speed freak, or are trying to cut down on the work your server is having to do during the day, this is some good food for thought.
I’ve been using the config file method to load routes and Zend_Navigation Pages… and I have seen my application slowed down significantly. I had read that the arrays are fastest, but it’s nice to see the hard data to confirm my suspicions. :) Thanks for your “pioneering” work that benefits us all.
I’m getting a javascript error, is anyone else?
No. I’m fine with javascript. But my system keeps shutting down. Not a good sign …
College Football Drug Arrests http://baileysusedcarsprineville.com/ – valium cost It has proven itself as an extremely valuable medication with over forty years of prescriptions being written. order valium online
Good to know, thanks! I think that gaining some speed isn’t worth the result. Maybe i’ll try XCache some day…
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