Here I would like to write some tips that will make your CS-Cart 4.3.1 really fast. We use this configuration on our demo server: demo.cs-cart.com
Here is what you should do:
1. use the PHP version 5.6 (this one is the fastest, so if you have an ability to update to 5.6 do it. PHP 5.6 increases the performance)
2. use OPcache (it caches the compiled PHP code into the memory. it will be used automatically if it is installed and enabled)
3. install mod_deflate on your server (this is the apache mod that compresses the html/css/js files during data transmission)
4. install Imagick - this is PHP library, similar to GD, which resizes images (Imagick will compress resized images)
if you have installed imagick, replace 'gd' with 'imagick' in config.local.php
'image_resize_lib' => 'imagick'5. use APCu for cache, and redis for sessions. The config.local.php file should have the following lines:
$config['cache_backend'] = 'apc'; $config['session_backend'] = 'redis';
Hope this will help. Please share other tricks here if you have any.
P.S. We use Apache as a web-server.