From f0f37853ca20e6b6b821434596f343aad670a20e Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Fri, 10 Jul 2020 12:41:26 -0400
Subject: [PATCH] Minor optimization for Page::isLoaded($fieldName) method

---
 wire/core/Page.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/wire/core/Page.php b/wire/core/Page.php
index 53340f31..d1012635 100644
--- a/wire/core/Page.php
+++ b/wire/core/Page.php
@@ -3819,7 +3819,10 @@ class Page extends WireData implements \Countable, WireMatchable {
 	 *
 	 */
 	public function isLoaded($fieldName = null) {
-		if($fieldName) return parent::get($fieldName) !== null;
+		if($fieldName) {
+			if($this->hasField($fieldName)) return isset($this->data[$fieldName]); 
+			return parent::get($fieldName) !== null;
+		}
 		return $this->isLoaded; 
 	}