# Env Call Analyzer
| Category | Severity | Time To Fix |
|---|---|---|
| 🚀 Performance | Major | 10 minutes |
Class: Enlightn\Enlightn\Analyzers\Performance\EnvCallAnalyzer
# Introduction
This analyzer ensures that your application code does not have calls to the env function outside of your config files. This is a major roadblock to configuration caching.
If you cache your configuration, all calls to the env function would return null. This means that your code will break with configuration caching.
It is recommended to only use the env function within your config files and nowhere else.