How to Evaluate Drupal Modules for Performance Optimization
Drupal was designed from the ground-up to be modular. Once you install Drupal core, you can add any number of modules to enhance Drupal's basic functions.
Unfortunately, contributed modules can also impede performance. For example, it's common to find contributed third-party modules that are incompatible with newer versions of Drupal, or other modules. Besides being a security hassle, this can often curb performance.