Improve performance of rb_eql()

This improvement is similar with https://github.com/ruby/ruby/pull/1552

internal.h: add declaration of rb_eql_opt() API.

vm_insnhelper.c (rb_eql_opt): add rb_eql_opt() API which provides optimized
    path for #eql? method such as rb_equal_opt().

object.c (rb_eql): optimize using rb_eql_opt() such as rb_equal().
    Array#eql? and some methods have used rb_eql() and Array#eql? will be faster
    around 20%.

    [ruby-core:80761] [Bug #13447] [Fix GH-#1589]

### Before
       user     system      total        real
   1.570000   0.000000   1.570000 (  1.569754)

### After
       user     system      total        real
   1.300000   0.000000   1.300000 (  1.303624)

### Test code
require 'benchmark'

Benchmark.bmbm do |x|
  ary1 = Array.new(1000) { rand(1000) }
  ary2 = Array.new(1000) { rand(1000) }

  x.report do
    5000000.times do
      ary1.eql?(ary2)
    end
  end

end

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58881 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 05aeefaa7d..a23983a5e0 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -1351,6 +1351,19 @@ rb_equal_opt(VALUE obj1, VALUE obj2)
     return opt_eq_func(obj1, obj2, &ci, &cc);
 }
 
+VALUE
+rb_eql_opt(VALUE obj1, VALUE obj2)
+{
+    struct rb_call_info ci;
+    struct rb_call_cache cc;
+
+    ci.mid = idEqlP;
+    cc.method_state = 0;
+    cc.class_serial = 0;
+    cc.me = NULL;
+    return opt_eq_func(obj1, obj2, &ci, &cc);
+}
+
 static VALUE vm_call0(rb_thread_t*, VALUE, ID, int, const VALUE*, const rb_callable_method_entry_t *);
 
 static VALUE