# HG changeset patch
# User drewp@bigasterisk.com
# Date 1685398648 25200
# Node ID 1b7cde922c3db3b8595cdea6d8559092092883f3
# Parent  dd9474bef2a658ab811599a6a69a795d33722b88
save some work

diff -r dd9474bef2a6 -r 1b7cde922c3d light9/web/SyncedGraph.ts
--- a/light9/web/SyncedGraph.ts	Mon May 29 15:16:57 2023 -0700
+++ b/light9/web/SyncedGraph.ts	Mon May 29 15:17:28 2023 -0700
@@ -51,7 +51,10 @@
     this.cachedFloatValues = new Map(); // s + '|' + p -> number
     this.cachedUriValues = new Map(); // s + '|' + p -> Uri
 
-    this._applyPatch(patchToDeleteEntireGraph(this.graph));
+    const p = patchToDeleteEntireGraph(this.graph);
+    if (!p.isEmpty()) {
+      this._applyPatch(p);
+    }
     // if we had a Store already, this lets N3.Store free all its indices/etc
     this.graph = new N3.Store();
     this.rebuildPrefixFuncs(this.prefixes);