From c252d50aa0a591c40043407ec9d259b7859dead3 Mon Sep 17 00:00:00 2001
From: Tobi Lutke <tobi@shopify.com>
Date: Wed, 11 Mar 2026 10:12:26 -0400
Subject: [PATCH] =?UTF-8?q?Avoid=20expr=5Fmarkup=20byteslice=20when=20name?=
 =?UTF-8?q?=20is=20entire=20markup=20string=20(no=20whitespace,=20no=20fil?=
 =?UTF-8?q?ters)\n\nResult:=20{"status":"keep","combined=5F=C2=B5s":4277,"?=
 =?UTF-8?q?parse=5F=C2=B5s":3057,"render=5F=C2=B5s":1220,"allocations":270?=
 =?UTF-8?q?26}?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 lib/liquid/variable.rb | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/liquid/variable.rb b/lib/liquid/variable.rb
index bd7a6727..a6c016fa 100644
--- a/lib/liquid/variable.rb
+++ b/lib/liquid/variable.rb
@@ -151,8 +151,12 @@ module Liquid
         pos += 1
       end
 
-      # Resolve the name expression
-      expr_markup = markup.byteslice(name_start, name_end - name_start)
+      # Resolve the name expression — avoid byteslice when markup is already the name
+      expr_markup = if name_start == 0 && name_end == len
+        markup # no whitespace, no filters — reuse the string
+      else
+        markup.byteslice(name_start, name_end - name_start)
+      end
       cache = parse_context.expression_cache
       ss = parse_context.string_scanner