# Dev Dependency Analyzer
| Category | Severity | Time To Fix |
|---|---|---|
| 🚀 Performance | Major | 1 minute |
Class: Enlightn\Enlightn\Analyzers\Performance\DevDependencyAnalyzer
# Introduction
This analyzer ensures that you do not have any dev dependencies installed in a production environment.
Dev dependencies can slow down your application in production. Dev packages are typically used for debugging and can have quite a significant overhead, especially with package auto discovery enabled.
Some of these packages record queries, events and other activities in memory, which produces both processing and memory overhead.
To run a Composer install on production, it is recommended to use the --no-dev flag to ensure dev dependencies are not installed:
composer install --prefer-dist --no-dev -o