Let’s imagine we have to replace in all posts of wordpress the chunk of text at once, or highlite the word, or put the link, etc. To edit every post might take a long time. There is an elegant and simple solution to achieve the task.
As you know the number of installed plugins affects the loading blog time. To display most commented posts without any plugin insert next code into template files (index.php, sidebar.php and so on.)
To deactivate the unneccessary default WordPress Widgets just insert next code in your functions.php file of your current theme. The following code should be adjusted depending on your needs;