Posts

fork the perl with binary code(linux x86 version)

Mar 14, 2009

In these days, Japanese perl mongers trying to inject a x86 binary code to the perl world with pure perl.

DynaLoader::dl_install_xsub inject binary code, that can call as CV(coderef).

Following is a sample code, call the fork(2).

use DynaLoader;
my $s = join('',
    "\x31\xc0", # xor %eax,%eax
    "\xb0\x02", # mov $0x2,%al
    "\xcd\x80", # int $0x80
    "\xc3",     # ret
);
DynaLoader::dl_install_xsub(
    'myfork',
    unpack("L",pack("P*",$s))
);
&myfork;

Enjoy!

About the functionality expansion of Mouse

Dec 7, 2008

Me(tokuhirom) and Yappo works for the Mouse in Shika-based branch.

Followings are Changes list.

method inject at apply roles(tokuhirom)
apply multi roles at once(yappo)
inline constructor at make_immutable(tokuhirom,sartak)
inline destructor at make_immutable(tokuhirom)
do not load Test::Exception at runtime(tokuhirom)
added MouseX::Types(yappo)
added Mouse::Meta::Class->create(_anon_class)?(tokuhirom)
user type definition(yappo)
added coercion support(yappo)

runtime speed is good enough.

Class::MOP: 0.71
Moose: 0.62
Mouse: 0.12
---- new
            Rate MooseOne MouseOne
MooseOne 89286/s       --      -4%
MouseOne 93458/s       5%       --
---- new,set
            Rate MouseOne MooseOne
MouseOne 62500/s       --      -4%
MooseOne 64935/s       4%       --

My work is finished.

Memory Usage in Class Builders

Dec 6, 2008

I wrote small tool for measurement process size.

Following is the result.

perl> package F; use Moose;
5,185,536
perl> use Mouse;
700,416
perl> use Shika;
581,632
perl> use Class::MOP;
1,957,888

Moose uses over 5MB.This is too much...

script is here: http://svn.coderepos.org/share/lang/perl/misc/memory-shell.pl

Performance improvements for Mouse

Dec 3, 2008

some people says "mouse is fast in loading time, but!!! mouse is slower than moose at runtime". ok, this is true in the latest released version of Mouse!

------ new
Rate MouseDefault MooseImmutableBuild ClassAccessor MooseImmutableDefault MouseImmutableDefault ShikaDefault Popo
MouseDefault           12658/s           --                -73%          -77%                  -82%                  -84%         -91% -95%
MooseImmutableBuild    47619/s         276%                  --          -14%                  -33%                  -38%         -67% -81%
ClassAccessor          55556/s         339%                 17%            --                  -22%                  -28%         -61% -78%
MooseImmutableDefault 71429/s         464%                 50%           29%                    --                   -7%         -50% -71%
MouseImmutableDefault 76923/s         508%                 62%           38%                    8%                    --         -46% -69%
ShikaDefault          142857/s        1029%                200%          157%                  100%                   86%           -- -43%
Popo                  250000/s        1875%                425%          350%                  250%                  225%          75%   --

I'm implement the Meta::Method::Constructor & Meta::Method::Desctructor for Mouse.This makes Mouse 500% faster at runtime.

and, some people says "Why Shika is FAST???" ok, i don't know ;) this is japanese XS magicians work.

benchmark script is here:http://svn.coderepos.org/share/lang/perl/Shika/trunk/benchmark/new-get-set.pl

make_immutable in Moose

Dec 2, 2008

this code will die.by "Attribute (foo) is required"

{
    package Parent;
    use Moose;
}
{
    package Child;
    use Moose;
    extends 'Parent';
}
Parent->meta->add_attribute(
    'foo' => (
        required => 1,
    )
);
Child->new();

but, following code doesn't throw error.

{
    package Parent;
    use Moose;
}
{
    package Child;
    use Moose;
    extends 'Parent';
    __PACKAGE__->meta->make_immutable();
}
Parent->meta->add_attribute(
    'foo' => (
        required => 1,
    )
);
Child->new();

conclusion
Moose doesn't mention to this operation.

loading time of Class builders

Dec 2, 2008

run -Ilib -e 'package F; use Moose'
total = 0.3154765
run -Ilib -e 'package F; use Mouse'
total = 0.0436822
run -Ilib -e 'package F; use Shika'
total = 0.0283219

ok, shika has few features =)

http://svn.coderepos.org/share/lang/perl/Shika/trunk/benchmark/loading-time.pl

【following ups】

run -Ilib -e 'package F; use Mouse'
total = 0.0307623

in shika based branch@r6714!yay!

main    =>      Mouse.pm        =>
Mouse   =>      strict.pm       =>
Mouse   =>      warnings.pm     =>
warnings        =>      Carp.pm =>
Carp    =>      Exporter.pm     =>
Mouse   =>      base.pm =>
base    =>      vars.pm =>
vars    =>      warnings/register.pm    =>
Mouse   =>      Mouse/Util.pm   =>
Mouse::Util     =>      Scalar/Util.pm =>
Scalar::Util    =>      List/Util.pm    =>
List::Util      =>      XSLoader.pm     =>
Mouse::Util     =>      MRO/Compat.pm   =>
MRO::Compat     =>      Class/C3.pm     =>
Class::C3       =>      Class/C3/XS.pm =>
Mouse   =>      Mouse/Meta/Attribute.pm =>
Mouse   =>      Mouse/Meta/Class.pm     =>
Mouse   =>      Mouse/Object.pm =>
Mouse   =>      Mouse/TypeRegistry.pm   =>
Exporter        =>      Exporter/Heavy.pm       =>

HTTP::Engine is optimized for CGI?

Dec 2, 2008

ANSWER is NO and YES.

Main target of the HTTP::Engine is FastCGI/ModPerl.

1. CGI is not a main target.

2. HTTP::Engine 0.0.x seriese uses a lot of memory.Shika makes smart process.

3. HTTP::Engine is middleware. not a application.middleware should use small memory.

4. Short compile time makes easy development.

5. As a side effect, HTTP::Engine::Interface::CGI is faster than before.

Why Shika?

Dec 2, 2008

Shika is a new class builder.Current main maintener is tokuhirom and yappo.

Shika's use case is very simple. Jus a HTTP::Engine.

Moose has cool API
Moose uses too much loading time for HTTP::Engine

perl -e 'use Moose' 0.30s user 0.01s system 94% cpu 0.330 total

Moose uses a lot of memory.
We need a lightweight class builder, based on cool API.
We don't need a MOP.
We can write faster implementation

no MOP;
use XS;(gfx can write very fast XS code =)
type check is optional(in development mode)
no eval.
Shika is Moose incompaible.

Shika supports

opional type constraints
Role, with, has, before, around, after, etc.

Mouse is the answer one of this problem. I know.

Current project status is

development release
no XS yet
loading time is 0.88sec => 0.11sec

shipped llv8call 0.07

Sep 28, 2008

The killer feature of this version is "shttpd support"(http://shttpd.sourceforge.net/).

Run the httpd by JavaScript!

v8ext.LoadBinary("org.coderepos.shttpd");
var SHTTPD = org.coderepos.shttpd.SHTTPD;
var httpd = new SHTTPD(8080);
httpd.RegisterURI("/", function (r) {
   r.Print("HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n");
   r.Print("<html><body>Hello, v8 world</body></html>");
   r.SetFlags(SHTTPD.END_OF_OUTPUT);
});
httpd.StartLoop();

Architecture of llv8call

Sep 28, 2008

llv8call is a good solution for server side javascript.It is composed of three parts.

1. Core

builtin functions
ARGV support
ENV support
better interactive mode based on libreadline

2.v8ext
v8ext is extension library library for v8. This module makes "easy to extend your application, uses v8".
This module provides 2 methods and 1 property