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…

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…

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…

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…

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…

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…

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…