When your goal is to optimize application performance it is very important to understand what goal do you really have. If you do not have a good understanding of the goal your performance optimization effort may well still bring its results but you m…

Java Performance Optimization by: Pierre-Hugues Charbonneau reference:http://refcardz.dzone.com/refcardz/java-performance-optimization Java is among the most widely used programming languages in the software development world today. Java applications…

OpenGL 性能优化 作者: Yang Jian (jyang@cad.zju.edu.cn) 日期: 2009-05-04 本文从硬件体系结构.状态机.光照.纹理.顶点数组.LOD.Cull等方面分析了如何优化 OpenGL 程序的性能. OpenGL状态机(State Machine) OpenGL状态机的目前只有1.1版本,也是最经典的,大家可以参考下述链接: ftp://ftp.sgi.com/opengl/doc/opengl1.1/state.pdf ftp://ftp.sgi.c…

DesktopGood performance is critical to the success of many games. Below are some simple guidelines for maximizing the speed of your game's graphical rendering. 好的性能,是很多游戏成功 的关键.下面是一些简单的指引,最大限度地提高你的游戏图形渲染速度. Optimizing Meshes 优化网格You only pay a render…

A LiveJournal course of development is a project in the 99 years began in the campus, a few people do as a hobby such an application, in order to achieve the following functions: Blog, forum Social network, find friends Polymerization article polymer…

Don't fetch any data that you don't need,or don't fetch any columns that you don't need. Because retrieving more data or more columns, which can increase network,I/O,memory and CPU overhead for the server. For example, if you need several columns you…

Chrome DevTools & performance ptimization https://www.bing.com https://developers.google.com/web/updates/2018/02/devtools…

我们先研究下构建渲染树前的几个步骤:也就是DOM和CSSOM,通常这些步骤的效果最差使你的网页呈现速度非常慢,我们是讨论尽可能快的将HTML流式传输给客户端,使浏览器能够开始构建DOM,还有其他注意事项吗?有一个HTML的尺寸呢?我想应该尽可能小,我们来看看实现这一目的一些策略,假设我想要优化这个HTML 要优化CSSOM,我们需要删除不必要的样式,缩小和压缩文件并缓存,对吧?对,这些都是很好的策略,安市没记错的话,当我们运行PageSpeed Insignts的时候,它还推荐我们查看下阻止呈现…

1.zipalign 2.ui优化 3.package size 4.RenderScript 5.Resource Shrinking & Code Shrinking 6.java code 1).LayoutInflator inflater(R.layout.xml, parent,false) 2).recycleView 3).soft reference http://www.cnblogs.com/zhangkai5157/p/3289532.html(导致应用图标在桌面消失)…

提高代码运行速度,或许我们从来没有优化这些页面来提高速度 想要开发优秀的网站,你必须了解你的用户,知道他们想要达到什么目的,同时还要明白浏览器的工作原理,从而能够打造快速良好的体验,我最近在PageSpeed Insights 中运行了我的网页,得分最低,该工具给出了一些建议,但是我不太明白,例如如何移除渲染屏蔽的JavaScript,什么是异步脚本.这些问题都与关键呈现路径相关,关键呈现路径是指浏览器呈现网页要经历的一系列步骤,我觉得很多人都认为浏览器负责所有工作,但是你一旦理解了浏览器是如何…

http://queue.acm.org/detail.cfm?id=1854041 The July/August issue of acmqueue is out now acmqueue is free for ACM professional members. Non-members can purchase an annual subscription for $19.99 or a single issue for $6.99. Download the app from iTune…

小结: 1. 小文件存储于一个文件中: 在内部,磁盘缓存(disk cache)实现了它自己的一组数据结构, 它们被存储在一个单独的缓存目录里.其中有索引文件(在浏览器启动时加载到内存中),数据文件(存储着实际数据,以及HTTP头以及其它信息).比较有趣 的是,16KB以下的文件存储于共同的数据块文件中(data block-files,即小文件集中存储于一个大文件中),其它较大的文件才会存储到自己专属的文件中.最后,磁盘缓存的淘汰策略是维护一个LRU,通 过比如访问频率和资源的使用时间(age…

1. Detecting Performance Issues 2. Scripting Strategies 3. The Benefits of Batching 4. Kickstart Your Art 5. Faster Physics 6. Dynamic Graphics 7. Masterful Memory Management 8. Tactical Tips and Tricks 1. Detecting Performance Issues  The Unity Prof…

小结: 1. 小文件存储于一个文件中: 在内部,磁盘缓存(disk cache)实现了它自己的一组数据结构, 它们被存储在一个单独的缓存目录里.其中有索引文件(在浏览器启动时加载到内存中),数据文件(存储着实际数据,以及HTTP头以及其它信息).比较有趣 的是,16KB以下的文件存储于共同的数据块文件中(data block-files,即小文件集中存储于一个大文件中),其它较大的文件才会存储到自己专属的文件中.最后,磁盘缓存的淘汰策略是维护一个LRU,通 过比如访问频率和资源的使用时间(age…

本文是Unity官方教程,性能优化系列的第二篇<Diagnosing performance problems using the Profiler window>的简单翻译. 相关文章: Unity性能优化(1)-官方教程The Profiler window翻译 Unity性能优化(2)-官方教程Diagnosing performance problems using the Profiler window翻译 Unity性能优化(3)-官方教程Optimizing garbage co…

http://www.softwaretestinghelp.com/what-is-performance-testing-load-testing-stress-testing/ Difference Between Performance Testing, Load Testing and Stress Testing – With Examples Q. What is difference between Performance Testing, Load Testing and St…

Java SE 6 provides an in-depth focus on performance, offering expanded tools for managing and monitoring applications and for diagnosing common problems. The improvements include: Monitoring and management API enhancements Official support for an imp…

ITU-T 建议书 G.1081 IPTV性能监测点 Performance monitoring points for IPTV Summary Successful deployment of IPTV servicesrequires performance parameters to be monitored at a number of different pointsin the complete end to end chain, including the customer pr…

Stephen Toub Download the Code Sample Asynchronous programming has long been the realm of only the most skilled and masochistic of developers-those with the time, inclination and mental capacity to reason about callback after callback of non-linear c…

本文转自:https://magedirect.co/how-to-speed-up-magento-2-maximum-performance/ Introduction In this article, we’ll show you how to run a Magento 2 store at maximum speed. We will review the most popular techniques that you can quickly implement today. So,…

Awesome Courses  Introduction There is a lot of hidden treasure lying within university pages scattered across the internet. This list is an attempt to bring to light those awesome courses which make their high-quality material i.e. assignments, lect…

refer: http://sqlblog.com/blogs/paul_white/archive/2012/04/28/query-optimizer-deep-dive-part-1.aspx    SQL是一种结构化查询语言规范,它从逻辑是哪个描述了用户需要的结果,而SQL服务器将这个逻辑需求描述转成能执行的物理执行计划,从而把结果返回给用户.将逻辑需求转换成一个更有效的物理执行计划的过程,就是优化的过程. 执行SQL的过程: Input Tree We start by looking…

100 open source Big Data architecture papers for data professionals. 读完这100篇论文 就能成大数据高手 作者 白宁超 2016年4月16日13:38:49 摘要:本文基于PayPal高级工程总监Anil Madan写的大数据文章,其中涵盖100篇大数据的论文,涵盖大数据技术栈(数据存储层.键值存储.面向列的存储.流式.交互式.实时系统.工具.库等),全部读懂你将会是大数据的顶级高手.作者通过引用Anil Madan原文和CS…

[it-ebooks]电子书列表   [2014]: Learning Objective-C by Developing iPhone Games || Leverage Xcode and Objective-C to develop iPhone games http://it-ebooks.info/book/3544/Learning Web App Development || Build Quickly with Proven JavaScript Techniques http:…

Home GameWorks Blog Life of a triangle - NVIDIA's logical pipeline   Life of a triangle - NVIDIA's logical pipeline Facebook Twitter LinkedIn Google+ By Christoph Kubisch, posted Mar 16 2015 at 12:52PM Tags:  GameWorks GameWorks Expert Developer DX12…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

http://thesecretlivesofdata.com/raft/ https://github.com/coreos/etcd   1 Introduction Consensus algorithms allow a collection of machines to work as a coherent group that can survive the failures of some of its members. Because of this, they play a k…

Recently my colleague Rasmus Johansson announced that MariaDB is adding support for the Facebook MyRocks storage engine. Today I'm going to share a bit more on what that means for MariaDB users. Members of the Facebook Database Engineering team helpe…

zhuan :https://www.linkedin.com/pulse/100-open-source-big-data-architecture-papers-anil-madan Big Data technology has been extremely disruptive with open source playing a dominant role in shaping its evolution. While on one hand it has been disruptiv…

Contents Tutorial Hello, World Command-Line Arguments Finding Duplicate Lines A Web Server Loose Ends Program Structure Names Declarations Variables Assignments Type Declarations Packages and Files Scope Basic Data Types Integers Floating-Point Numbe…