refactor: Optimize HeadersToAddEntry class layout (#37215)

Signed-off-by: Yury Kats <[email protected]>
envoyproxy · Nov 18, 2024 · e2cec22 · e2cec22
1 parent b580053
commit e2cec22
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/source/common/router/header_parser.h b/source/common/router/header_parser.h
@@ -40,10 +40,10 @@ struct HeadersToAddEntry {
   }
 
   std::string original_value_;
-  bool add_if_empty_ = false;
-
   Formatter::FormatterPtr formatter_;
   HeaderAppendAction append_action_;
+  // Keep small members (bools and enums) at the end of class, to reduce alignment overhead.
+  bool add_if_empty_ = false;
 
 protected:
   HeadersToAddEntry(const HeaderValue& header_value, HeaderAppendAction append_action,