use rb_hash_new_with_size()

* hash.c: use rb_hash_new_with_size().

* marshal.c: ditto

* struct.c: ditto

* vm_args.c: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60085 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

hash.c

@@ -2426,7 +2426,7 @@ rb_hash_invert_i(VALUE key, VALUE value, VALUE hash)
 static VALUE
 rb_hash_invert(VALUE hash)
 {
-    VALUE h = rb_hash_new();
+    VALUE h = rb_hash_new_with_size(RHASH_SIZE(hash));
 
     rb_hash_foreach(hash, rb_hash_invert_i, h);
     return h;

marshal.c

@@ -1772,7 +1772,7 @@ r_object0(struct load_arg *arg, int *ivp, VALUE extmod)
 	{
 	    long len = r_long(arg);
 
-	    v = rb_hash_new();
+	    v = rb_hash_new_with_size(len);
 	    v = r_entry(v, arg);
 	    arg->readable += (len - 1) * 2;
 	    while (len--) {

struct.c

@@ -794,7 +794,7 @@ rb_struct_to_a(VALUE s)
 static VALUE
 rb_struct_to_h(VALUE s)
 {
-    VALUE h = rb_hash_new();
+    VALUE h = rb_hash_new_with_size(RSTRUCT_LEN(s));
     VALUE members = rb_struct_members(s);
     long i;
 

vm_args.c

@@ -239,7 +239,7 @@ args_kw_argv_to_hash(struct args_info *args)
     const struct rb_call_info_kw_arg *kw_arg = args->kw_arg;
     const VALUE *const passed_keywords = kw_arg->keywords;
     const int kw_len = kw_arg->keyword_len;
-    VALUE h = rb_hash_new();
+    VALUE h = rb_hash_new_with_size(kw_len);
     const int kw_start = args->argc - kw_len;
     const VALUE * const kw_argv = args->argv + kw_start;
     int i;
@@ -257,11 +257,11 @@ args_kw_argv_to_hash(struct args_info *args)
 static void
 args_stored_kw_argv_to_hash(struct args_info *args)
 {
-    VALUE h = rb_hash_new();
     int i;
     const struct rb_call_info_kw_arg *kw_arg = args->kw_arg;
     const VALUE *const passed_keywords = kw_arg->keywords;
     const int passed_keyword_len = kw_arg->keyword_len;
+    VALUE h = rb_hash_new_with_size(passed_keyword_len);
 
     for (i=0; i<passed_keyword_len; i++) {
 	rb_hash_aset(h, passed_keywords[i], args->kw_argv[i]);
@@ -365,7 +365,7 @@ static VALUE
 make_rest_kw_hash(const VALUE *passed_keywords, int passed_keyword_len, const VALUE *kw_argv)
 {
     int i;
-    VALUE obj = rb_hash_new();
+    VALUE obj = rb_hash_new_with_size(passed_keyword_len);
 
     for (i=0; i<passed_keyword_len; i++) {
 	if (kw_argv[i] != Qundef) {
@@ -780,7 +780,7 @@ vm_caller_setup_arg_kw(rb_control_frame_t *cfp, struct rb_calling_info *calling,
     struct rb_call_info_with_kwarg *ci_kw = (struct rb_call_info_with_kwarg *)ci;
     const VALUE *const passed_keywords = ci_kw->kw_arg->keywords;
     const int kw_len = ci_kw->kw_arg->keyword_len;
-    const VALUE h = rb_hash_new();
+    const VALUE h = rb_hash_new_with_size(kw_len);
     VALUE *sp = cfp->sp;
     int i;