ExprCacheHelper: Reduce PHPParser instantiation

Author: staabm

src/Reflection/ExprCacheHelper.php

@@ -9,13 +9,14 @@
 
 final class ExprCacheHelper
 {
+    private static BetterReflection $betterReflection;
 
     /**
      * @return array<string, mixed
      */
     public static function export(Expr $expr): array
     {
-        $br = new BetterReflection();
+        $br = self::$betterReflection ??= new BetterReflection();
 
         $attributes = [];
         foreach (['startLine', 'endLine', 'startTokenPos', 'startFilePos', 'endTokenPos', 'endFilePos'] as $key) {
@@ -33,7 +34,7 @@ public static function import(array $data): Expr
         $code = $data['code'];
         $attributes = $data['attributes'];
 
-        $br = new BetterReflection();
+        $br = self::$betterReflection ??= new BetterReflection();
         $expr = $br->originalPhpParser()->parse('<?php ' . $code . ';')[0]->expr;
         foreach ($attributes as $key => $value) {
             $expr->setAttribute($key, $value);