Replace @blocks.each with while loop in If render — avoids block proc allocation per render\n\nResult: {"status":"keep","combined_µs":3496,"parse_µs":2356,"render_µs":1140,"allocations":24530}

lib/liquid/tags/if.rb

@@ -51,14 +51,17 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      @blocks.each do |block|
+      idx = 0
+      blocks = @blocks
+      while idx < blocks.length
+        block = blocks[idx]
         result = block.evaluate(context)
-        # Inline to_liquid_value fast path — respond_to? check is rarely true
         result = result.to_liquid_value if result.respond_to?(:to_liquid_value)
 
         if result
           return block.attachment.render_to_output_buffer(context, output)
         end
+        idx += 1
       end
 
       output