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  Why should we keep column as NOT NULL instead of NULL in MySQL?

Keep table column as NOT NULL instead of NULL except in some special cases. This statement is cited by many articles of MySQL optimization, but they don't say why we should do this. Here we discuss about this. First why are there many people using NULL when defining table? The reasons may be: NULL the the default when defining table, the rookies or people who don't want to have much troubles will keep this default setting Many people think NOT NULL will require more space Many people don't want...

   MySQL,NULL,reason     2012-10-27 03:21:27

  Code Optimization Techniques for Graphics Processing Units

Books on parallel programming theory often talk about such weird beasts like the PRAM model, a hypothetical hardware that would provide the programmer with a number of processors that is proportional to the input size of the problem at hand. Modern general purpose computers afford only a few processing units; four is currently a reasonable number. This limitation makes the development of highly parallel applications quite difficult to the average computer user. However, the low cost and th...

   Optimazation,GUI,Graphic processing     2011-12-18 01:11:53

  The Curious Case of App Store Optimization

You may have heard of App Store Optimization (ASO) and feel your brains go into overdrive! Chances are you probably have no idea what that means or that it appears pretty much the same as Search Engine Optimization (SEO), only to realize that it is not so. Despite being warily relatable to SEO, the reality of ASO is far more deep and complex. A key differentiator of ASO and SEO is what happens when a visitor or user enters the website or the app, in this case. The moment a user enters the site t...

   iOS App Development Company, Mobile App Company, iphone App Development Company, Mobile Application     2015-08-14 09:06:22

  Landing page optimization : Less is more

There is a question on Quora : Why doesn't Quora show interesting questions/answers on their landing page? Why is it this? not this? Quora's product manage gives his answer to this question, it's agreed by many users in this community. Here is his answer: The logged out homepage is pretty sparse now mostly because it hasn't been given much treatment since the initial product launch. But we have plans on redesigning it and testing different variations (some with less info on the page, some with...

   Landing page,Optimization,Principle     2012-11-03 01:50:07

  How To Write A Good Programming Test

I’ve taken and marked a lot of programming tests in the past. I love doing them as it’s always good to see what challenges different programmers have come up with when designing them. Unfortunately, however, most of them aren’t very good. Below is a list of general ideas to help increase the quality of programmer tests. 1. Keep it relevant Too many of the tests have questions on content that simply isn’t relevant to the job. The whole idea behind a programming test i...

   Programming test,Interview,Questions,Pro     2011-08-26 02:46:44

  Want to make your Eclipse run faster? Try this

Lots of us may find that our Eclipse takes a long time to launch, remember how many times you want to close this heavy machine and shout "F**K". Do you know why Eclipse launches slowly? Is it because we have too many plugins installed or we have created too many projects? No, it's not. Sometimes, it's because we don't have the correct configuration. So where to start? Go to eclipse.ini. First, you may want to add below line in your eclipse.ini configuration file: -Xloggc:gc.log This is to show w...

   Eclipse,optimization,speed     2014-06-10 05:31:11

  Windows 8.1 will be released on October 18

According to TheVerge, Microsoft Windows 8.1 will be released on October 18. Windows 8 users can download the free update on Windows Store one day before the release date, There will be a formal release press on October 18. In next few weeks, Windows 8 RTM will be open to PC manufacturers and partners. In this year's WPC, Microsoft demonstrated their latest Windows 8.1 on various devices most of the time, including the 8-inch Tablet PC, laptops, desktops and even streamed content from PC to Xbo...

   Windows 8.1,Release date     2013-08-14 11:49:09

  How to optimize MySQL insert statement

For a big data system, one problem is the data access efficiency, one more problem is that the data insertion is very slow. We had a service system, the data loading process would take 4-5 hours. This time consuming operation is risky since if the program is interrupted during the loading process, it might be rerun, this will be troublesome. So it's necessary to improve the insertion efficiency for big data systems. Here we provide two optimization suggestions. 1. Combine multiple insert stateme...

   MySQL,insert,optimization     2012-10-24 22:03:13

  Unix Philosophy

First, let me tell two stories.The first one is one Japan soap factory had a problem that they sometimes shipped empty boxes to the customer without soap inside. So they spend much time and money to invent a X-ray machine to check whether the soap box is empty.The same thing happens in a small factory which doesn't have too much money. The solution of them to solve this problem is they use a desk fan to blow the empty boxes out of the belt and into a bin.The second story is NASA finds that in sp...

   Unix Philosophy,Simple,Rules     2012-05-06 06:49:26

  How to Develop a Successful SEO Strategy for Your Startup

SEO is usually viewed as under-the-table formula manipulations and trickery, once actually it’s simply a series of core steps and actions you wish to require, to create your web site rank higher. An economical SEO strategy may be countermined to the subsequent three parts, that create the entire issue look less daunting in spite of everything.   Step 1: On-site Optimization On-site optimization strategy consists of these subsequent elements: Your Content Website Structure Layout of ...

   SEO,MARKETING     2016-03-18 15:33:37

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