varis

// AndroidManifest.xml must have the following permission:
// <uses-permission android:name="android.permission.GET_TASKS"/>
ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);

jcouyang

本文基本上这为两篇文章的翻译和整合 -- Scalable networking And Why are event-driven server so great

OPPC模型瓶颈

传统服务器模型如Apache为每一个请求生成一个子进程。当用户连接到服务器的一个子进程就产生，并处理连接。每个连接获得一个单独的线程和子进程。当用户请求数据返回时，子进程开始等待数据库操作返回。如果此时另一个用户也请求返回数据，这时就产生了阻塞。

这种模式在非常小的工作负荷是表现良好，当请求的数量变得太大是服务器会压力过于巨大。 当Apache达到进程的最大数量，所有进程都变得缓慢。每个请求都有自己的线程，如果服务代码使用PHP编写时，每个进程所需要的内存量是相当大的[1]。

fork()操作延时

haggen

// Apple Crayon Palette RGB

$cantaloupe: rgb(255, 206, 110);
$honeydew:   rgb(206, 250, 110);
$spindrift:  rgb(104, 251, 208);
$sky:        rgb(106, 207, 255);
$lavender:   rgb(210, 120, 255);
$carnation:  rgb(255, 127, 211);
$licorice:   rgb(0, 0, 0);
$snow:       rgb(255, 255, 255);

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

nickbutcher

<?xml version="1.0" encoding="utf-8"?>
<!--
  Copyright (C) 2015 The Android Open Source Project

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0