From db9978f8c2b35ff2e671eb4be47a9b5772b740ff Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@jermolene.com>
Date: Tue, 16 Apr 2024 11:59:52 +0100
Subject: [PATCH] Syncer should only save existing tiddlers if they have
 changed

---
 core/modules/syncer.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/modules/syncer.js b/core/modules/syncer.js
index f7627e1ac..f08e888b5 100644
--- a/core/modules/syncer.js
+++ b/core/modules/syncer.js
@@ -257,7 +257,11 @@ Save an incoming tiddler in the store, and updates the associated tiddlerInfo
 Syncer.prototype.storeTiddler = function(tiddlerFields) {
 	// Save the tiddler
 	var tiddler = new $tw.Tiddler(tiddlerFields);
-	this.wiki.addTiddler(tiddler);
+	// Only save the tiddler if it has changed
+	var existingTiddler = this.wiki.getTiddler(tiddlerFields.title);
+	if(!existingTiddler || !existingTiddler.isEqual(tiddler)) {
+		this.wiki.addTiddler(tiddler);
+	}
 	// Save the tiddler revision and changeCount details
 	this.tiddlerInfo[tiddlerFields.title] = {
 		revision: this.getTiddlerRevision(tiddlerFields.title),