diff --git a/src/Psalm/Provider/ClassLikeStorageProvider.php b/src/Psalm/Provider/ClassLikeStorageProvider.php
index b84b84b53..a92134f8d 100644
--- a/src/Psalm/Provider/ClassLikeStorageProvider.php
+++ b/src/Psalm/Provider/ClassLikeStorageProvider.php
@@ -5,7 +5,11 @@ use Psalm\Storage\ClassLikeStorage;
 
 class ClassLikeStorageProvider
 {
-    /** @var array<string, ClassLikeStorage> */
+    /**
+     * Storing this statically is much faster (at least in PHP 7.2.1)
+     *
+     * @var array<string, ClassLikeStorage>
+     */
     private static $storage = [];
 
     /**
diff --git a/src/Psalm/Provider/FileStorageProvider.php b/src/Psalm/Provider/FileStorageProvider.php
index f185ed9e2..e53b2b707 100644
--- a/src/Psalm/Provider/FileStorageProvider.php
+++ b/src/Psalm/Provider/FileStorageProvider.php
@@ -7,6 +7,7 @@ class FileStorageProvider
 {
     /**
      * A list of data useful to analyse files
+     * Storing this statically is much faster (at least in PHP 7.2.1)
      *
      * @var array<string, FileStorage>
      */