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* hash.c (rb_hash_flatten): performance improvement by not using

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rb_hash_to_a() to avoid array creation with rb_assoc_new().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42039 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
glass 2013-07-18 08:48:12 +00:00
parent faa9d5eced
commit 852caed8a3
2 changed files with 26 additions and 7 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Thu Jul 18 17:35:41 2013 Masaki Matsushita <glass.saga@gmail.com>
* hash.c (rb_hash_flatten): performance improvement by not using
rb_hash_to_a() to avoid array creation with rb_assoc_new().
Thu Jul 18 16:16:17 2013 Koichi Sasada <ko1@atdot.net>
* array.c: add logging feature for RGenGC's write barrier unprotect

28
hash.c
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@ -2187,6 +2187,18 @@ rb_hash_rassoc(VALUE hash, VALUE obj)
return args[1];
}
static int
flatten_i(VALUE key, VALUE val, VALUE ary)
{
VALUE pair[2];
pair[0] = key;
pair[1] = val;
rb_ary_cat(ary, pair, 2);
return ST_CONTINUE;
}
/*
* call-seq:
* hash.flatten -> an_array
@ -2206,15 +2218,17 @@ rb_hash_rassoc(VALUE hash, VALUE obj)
static VALUE
rb_hash_flatten(int argc, VALUE *argv, VALUE hash)
{
VALUE ary, tmp;
VALUE ary;
ary = rb_hash_to_a(hash);
if (argc == 0) {
argc = 1;
tmp = INT2FIX(1);
argv = &tmp;
ary = rb_ary_new_capa(RHASH_SIZE(hash) * 2);
rb_hash_foreach(hash, flatten_i, ary);
if (argc) {
int level = FIX2INT(*argv) - 1;
if (level > 0) {
*argv = INT2FIX(level);
rb_funcall2(ary, rb_intern("flatten!"), argc, argv);
}
}
rb_funcall2(ary, rb_intern("flatten!"), argc, argv);
return ary;
}