From 945ed64971a197477fad61abf99e2271028d5057 Mon Sep 17 00:00:00 2001
From: Tomas Abrahamsson <tomas.abrahamsson@gmail.com>
Date: Mon, 19 Feb 2024 17:24:46 +0100
Subject: [PATCH] Add @generated to the output erl

The intention is to mitigate performance issues with
the Erlang laguage platform.
---
 src/gpb_compile.erl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gpb_compile.erl b/src/gpb_compile.erl
index d5ecf33..61b0bc7 100644
--- a/src/gpb_compile.erl
+++ b/src/gpb_compile.erl
@@ -4392,7 +4392,8 @@ format_erl(Mod, Defs, DefsNoRenamings, DefsForIntrospect,
     DoDecoders = gpb_lib:get_gen_decoders(Opts),
     CompileOptsStr = get_erlc_compile_options_str(Opts),
     gpb_lib:iolist_to_utf8_or_escaped_binary(
-      [?f("%% @private~n"
+      [?f("%% % this file is @generated~n"
+          "%% @private~n"
           "%% Automatically generated, do not edit~n"
           "%% Generated by ~p version ~s~n"
           "%% Version source: ~s~n",