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Speeds up fallback to Hash#default_proc in rb_hash_aref by removing a method call

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Lourens Naudé 2020-01-08 00:19:26 +00:00 committed by Nobuyoshi Nakada
parent 13f4f07f21
commit 592d7ceeeb
Notes: git 2020-01-08 18:10:16 +09:00 
Merged: https://github.com/ruby/ruby/pull/2821
2 changed files with 13 additions and 5 deletions
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6
benchmark/hash_defaults.yml Normal file
View file

@ -0,0 +1,6 @@
prelude: |
h = Hash.new { :foo }
benchmark:
default_aref: h[1]
default_method: h.default(1)
loop_count: 1000000

12
hash.c
View file

@ -105,7 +105,7 @@ rb_hash_freeze(VALUE hash)
VALUE rb_cHash;
static VALUE envtbl;
static ID id_hash, id_yield, id_default, id_flatten_bang;
static ID id_hash, id_default, id_flatten_bang;
static ID id_hash_iter_lev;
VALUE
@ -1945,11 +1945,14 @@ rb_hash_rehash(VALUE hash)
VALUE
rb_hash_default_value(VALUE hash, VALUE key)
{
if (rb_method_basic_definition_p(CLASS_OF(hash), id_default)) {
VALUE args[2];
if (LIKELY(rb_method_basic_definition_p(CLASS_OF(hash), id_default))) {
VALUE ifnone = RHASH_IFNONE(hash);
if (!FL_TEST(hash, RHASH_PROC_DEFAULT)) return ifnone;
if (key == Qundef) return Qnil;
return rb_funcall(ifnone, id_yield, 2, hash, key);
args[0] = hash;
args[1] = key;
return rb_proc_call_with_block(ifnone, 2, args, Qnil);
}
else {
return rb_funcall(hash, id_default, 1, key);
@ -2124,7 +2127,7 @@ rb_hash_default(int argc, VALUE *argv, VALUE hash)
if (argc == 0) return Qnil;
args[0] = hash;
args[1] = argv[0];
return rb_funcallv(ifnone, id_yield, 2, args);
return rb_proc_call_with_block(ifnone, 2, args, Qnil);
}
return ifnone;
}
@ -6312,7 +6315,6 @@ Init_Hash(void)
#undef rb_intern
#define rb_intern(str) rb_intern_const(str)
id_hash = rb_intern("hash");
id_yield = rb_intern("yield");
id_default = rb_intern("default");
id_flatten_bang = rb_intern("flatten!");
id_hash_iter_lev = rb_make_internal_id();