You can add some incredible functionality to WordPress by installing plug-ins. If you run a quick Google search you will find where WordPress power users have posted lists of “essential” plug-ins.
The law of conservation of energy being what it is, however, you give up speed as you add more plug-ins. As a rule, a site running 10 plug-ins will be faster and more stable than a site running 25 plug-ins.
In addition, some plug-ins do not play well together, and, worse, some plug-ins are poorly coded and will hog resources. For example, there is a really useful plugin called Broken Link checker, but activated using certain configurations can really slow your site down. [Read more…] about How to Solve a “Fatal Error: Allowed Memory Size Exhausted” Problem
