As all of us know that Joomla is one of the very popular,robust CMS(Content Managment Systems).We can optimize a Joomla application by following some basic tips and will get a better and faster application.
1- Decrease the number of external and internal links on the pages.
2- The contents which are not being used in the front page should be removed.Organize the front page in category and section so that it will be easier to navigate easily for the user and reduce the loading time of the website.
3- Enable caching and inbuilt Gzip.
To enable cache goto Extensions->Plugin Manager->System-Cache ->Mark it enabled.
To enable inbuilt Gzip goto Global Configuration->Make the GZip Page Compression YES.
4- Components,plugins,modules and mambots usually makes the application slow.so its better to uninstall the unused components,plugins,modules and mambots.
5- Joomla Templates are one of the main reason to slow down the application.So its always better to use a simple template and uninstall the unused templates.
6- Compress the CSS/JS files and images speed up the Joomla application.
7- One should optimize the database to speed up the application.