From cf062e1da2bd6ad24e31be1892b38d48f3c45dcf Mon Sep 17 00:00:00 2001
From: Tobi Lutke <tobi@shopify.com>
Date: Wed, 11 Mar 2026 08:50:34 -0400
Subject: [PATCH] fast-path slice_collection: skip copy for full Array without
 offset/limit

---
 lib/liquid/utils.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/liquid/utils.rb b/lib/liquid/utils.rb
index 084739a2..a00cb48e 100644
--- a/lib/liquid/utils.rb
+++ b/lib/liquid/utils.rb
@@ -8,6 +8,9 @@ module Liquid
     def self.slice_collection(collection, from, to)
       if (from != 0 || !to.nil?) && collection.respond_to?(:load_slice)
         collection.load_slice(from, to)
+      elsif from == 0 && to.nil? && collection.is_a?(Array)
+        # Fast path: no offset/limit on an Array — return as-is (avoid copy)
+        collection
       else
         slice_collection_using_each(collection, from, to)
       end