Rest API w with SlimPhp take too much time - php

Question

I developed a REST API using php and slim, I am trying to optimize it , for a simple empty request with slim I have 56requests per second , and if I don't use slim I have 259r/s .
What Should I do to reach 259r/s with Slim
-- Index.php
use \Slim\App;
$container=include('Config/Container.php');
$app = new App($container);
$app->get('/metro',function(){
echo "metro";
});
-- container.php
$config = [
'settings' => [
'displayErrorDetails' => true,
'mode'=>'developpement',
'determineRouteBeforeAppMiddleware' => true,
'addContentLengthHeader' => false,
]
];
.htacess
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [QSA,L]
RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
php_flag display_errors 1

Answer 1

All frameworks are by definition slower than no-code as there's more going on.
i.e.
<?php
echo 'metro';
is going to be much faster than a Slim application with this code:
use \Slim\App;
$config = include 'Config/Container.php';
$app = new App($config);
$app->get('/metro', function($request, $response){
return $response->write("metro");
});
$app->run();
This is because the Slim application is doing a lot more to enable it to respond to different URLs (routing) and handle error situations. That is the first block of code will not send back a 404 if you go to the /foo URL.
To compare, you need to make the "non-framework" version have the same functionality as the Slim version. The performance difference will be much smaller.