From: Masaya TARUI <tarui@...>
Date: 2016-04-13T10:30:55+09:00
Subject: [ruby-core:74914] Re: [Ruby trunk Bug#12274] accessing to instance variable should be fast.

2016-04-13 5:41 GMT+09:00  <eregontp@gmail.com>:
> Issue #12274 has been updated by Benoit Daloze.
>avoiding some ID2SYM/INT2FIX (but these two seem performed at compile time, so mostly irrelevant for the benchmark)?

It is not for avoiding ID2SYM (In fact, it is calculated every time
:-), it is for sharing.
Please check the 0007 below

$ ./ruby -v --disable-gems --dump=insns -e"@a=1;p @a"
ruby 2.4.0dev (2016-04-12 trunk 54553) [x86_64-linux]
== disasm: #<ISeq:<main>@-e>============================================
0000 trace            1                                               (   1)
0002 putobject_OP_INT2FIX_O_1_C_
0003 setinstancevariable :@a, <is:0>
0006 putself
0007 getinstancevariable :@a, <is:1>
0010 opt_send_without_block <callinfo!mid:p, argc:1,
FCALL|ARGS_SIMPLE>, <callcache>
0013 leave


$ ./ruby -v --disable-gems --dump=insns -e"@a=1;p @a"
ruby 2.4.0dev (2016-04-12 fast-ivar-access 54553) [x86_64-linux]
== disasm: #<ISeq:<main>@-e>============================================
0000 trace            1                                               (   1)
0002 putobject_OP_INT2FIX_O_1_C_
0003 setinstancevariable :@a, <is:0>
0006 putself
0007 getinstancevariable :@a, <is:0>
0010 opt_send_without_block <callinfo!mid:p, argc:1,
FCALL|ARGS_SIMPLE>, <callcache>
0013 leave


-- 
������������(Masaya TARUI)
No Tool,No Life.

Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>