More memoization

src/Psalm/Type/Atomic/TKeyedArray.php

@@ -455,6 +455,8 @@
         return $prop_min_count;
     }
 
+    /** @var int<1, max>|null */
+    private ?int $prop_max_count = null;
     /**
      * Returns null if there is no upper limit.
      *
@@ -465,14 +467,17 @@
         if ($this->fallback_params) {
             return null;
         }
+        if ($this->prop_max_count !== null) {
+            return $this->prop_max_count;
+        }
         $prop_max_count = 0;
         foreach ($this->properties as $property) {
             if (!$property->isNever()) {
                 $prop_max_count++;
             }
         }
         assert($prop_max_count !== 0);
-        return $prop_max_count;
+        return $this->prop_max_count = $prop_max_count;
     }
     /**
      * Whether all keys are always defined (ignores unsealedness).