karupanerura

class Libhsclient < Formula
  desc "HandlerSocket Client library"
  homepage "https://github.com/DeNA/HandlerSocket-Plugin-for-MySQL"
  url "https://github.com/DeNA/HandlerSocket-Plugin-for-MySQL/archive/1.1.2.tar.gz"
  sha256 "79aafb1e46307d1b5c14d9c91aad1c39ac626432b6adcc2636a03f6a4ccce5fd"

  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "libtool" => :build

karupanerura

use strict;
use warnings;

use Encode;
use Encode::Locale;
use LWP::Protocol;
use URI;

sub dump_env { join ", ", map { "$_: ".($ENV{$_}||'(undef)') } qw/REQUEST_METHOD HTTP_PROXY CGI_HTTP_PROXY/ }

karupanerura

package main;
use Scope::UndefSafe;
sub it() { $_ }

package Let::it;
sub be { __PACKAGE__ }

package main;
my $let = my $it = my $be = \&Let'it::be;
let { it->be } Let'it::be()->$let->$it->$be;

karupanerura

#include <stdio.h>
#include <dlfcn.h>
#include <sys/types.h>

int main(void) {
  void *handle = dlopen("/usr/lib/libc.dylib", RTLD_LAZY);
  unsigned int (*mysleep)(unsigned int) = dlsym(handle, "sleep");
  int (*myfork)(void) = dlsym(handle, "fork");
  void (*mywait)(int*) = dlsym(handle, "wait");
  pid_t (*mygetpid)(void) = dlsym(handle, "getpid");

karupanerura

Time::Strptime: 0.01_1
Time::Moment: 0.24
POSIX::strptime: 0.10
Time::Piece: 1.30
DateTime: 1.20
DateTime::TimeZone: 1.92
DateTime::Locale: 0.46

karupanerura

発生した問題

C99実装の浮動小数点演算の演算精度をチューニングした結果、一部のテストケースがFAILするようになった。

問題になるテストケース

• 緯度:0
• 経度:-60.46875

該当ファイル:

karupanerura

CREATE TABLE `foo` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `created_at` datetime NOT NULL,
  PRIMARY KEY (`id`,`created_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
PARTITION BY RANGE COLUMNS(created_at) (
  PARTITION p201505 VALUES LESS THAN ('2015-06-01') COMMENT = '2015-06-01' ENGINE = InnoDB,
  PARTITION p201506 VALUES LESS THAN ('2015-07-01') COMMENT = '2015-07-01' ENGINE = InnoDB,
  PARTITION p201507 VALUES LESS THAN ('2015-08-01') COMMENT = '2015-08-01' ENGINE = InnoDB,
  PARTITION p201508 VALUES LESS THAN ('2015-09-01') ENGINE = InnoDB

karupanerura

No reason. We just need code that makes processing faster! Yes! We are performance freak.

In this talk, I'll talk about tips of how to write code in perl that makes processing faster.

Topics:

• XS vs PP implementation
  • Example: DateTime vs Time::Piece vs Time::Moment
• Example: Time::Strptime

karupanerura

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>

struct udp_socket {

karupanerura

package net.yanzm.profileapplication;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.app.FragmentManager;
import android.content.Intent;
import android.net.Uri;