https://git.ruby-lang.org/ruby.git/commit/?id=ab31693af1

From ab31693af109022ecc0a01107067d5c84675807a Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sat, 10 Aug 2019 11:38:49 +0900
Subject: Share caches for short encoding ivar name.


diff --git a/marshal.c b/marshal.c
index 61c7c13..6b475aa 100644
--- a/marshal.c
+++ b/marshal.c
@@ -83,6 +83,7 @@ shortlen(size_t len, BDIGIT *ds) https://github.com/ruby/ruby/blob/trunk/marshal.c#L83
 static ID s_dump, s_load, s_mdump, s_mload;
 static ID s_dump_data, s_load_data, s_alloc, s_call;
 static ID s_getbyte, s_read, s_write, s_binmode;
+static ID s_encoding_short;
 
 #define name_s_dump	"_dump"
 #define name_s_load	"_load"
@@ -96,6 +97,7 @@ static ID s_getbyte, s_read, s_write, s_binmode; https://github.com/ruby/ruby/blob/trunk/marshal.c#L97
 #define name_s_read	"read"
 #define name_s_write	"write"
 #define name_s_binmode	"binmode"
+#define name_s_encoding_short "E"
 
 typedef struct {
     VALUE newclass;
@@ -559,7 +561,7 @@ w_uclass(VALUE obj, VALUE super, struct dump_arg *arg) https://github.com/ruby/ruby/blob/trunk/marshal.c#L561
     }
 }
 
-#define to_be_skipped_id(id) (id == rb_id_encoding() || id == rb_intern("E") || !rb_id2str(id))
+#define to_be_skipped_id(id) (id == rb_id_encoding() || id == s_encoding_short || !rb_id2str(id))
 
 struct w_ivar_arg {
     struct dump_call_arg *dump;
@@ -634,7 +636,7 @@ w_encoding(VALUE encname, struct dump_call_arg *arg) https://github.com/ruby/ruby/blob/trunk/marshal.c#L636
     switch (encname) {
       case Qfalse:
       case Qtrue:
-	w_symbol(ID2SYM(rb_intern("E")), arg->arg);
+	w_symbol(ID2SYM(s_encoding_short), arg->arg);
 	w_object(encname, arg->arg, limit);
         return 1;
       case Qnil:
@@ -2293,6 +2295,7 @@ Init_marshal(void) https://github.com/ruby/ruby/blob/trunk/marshal.c#L2295
     set_id(s_read);
     set_id(s_write);
     set_id(s_binmode);
+    set_id(s_encoding_short);
 
     rb_define_module_function(rb_mMarshal, "dump", marshal_dump, -1);
     rb_define_module_function(rb_mMarshal, "load", marshal_load, -1);
-- 
cgit v0.10.2


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