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Introduction to the methods of efficiency improvement and optimization in PHP

%-strlen 75% ======================================================== Short code is not necessarily fast Longest if ($a = = $b) {$str. = $a;} else {$str. = $b;}//longer if ($a = = $b) {$str. = $a;} $str. = $b; Short $str. = ($a = = $b? $a: $b); Which one do you think is fast? Efficiency comparison: -longest:4.27-longer:4.43-short:4.76 Incredible? One more: Original $d = Dir ('. '); while ($entry = $d->read ())!== false) {if ($entry = = '. ' | | $entry = = ' ... ') {continue;} } //

The future of Cws,xenapp and XenDesktop

a service. We also wrote severalarticles about what Citrix needs a DaaS strategy that's better than Theircurrent, "Well, we have VDI p Roducts which our partners can use to Deliverdaas offerings. " We even wrote that Citrix should buy a huge DaaS Providerso they can enter the DaaS market directly.After seeing the Cwsprototype, I had completely changed my mind, because building CWS puts citrixin a much better positio N than if they had tried to compete as another "MeToo" DaaS provider.Thinking a

Comparison of conditional judgment statements

! = 0)§ 3. floating-point variable versus 0-value comparison There is a precision limit for variables of type float or double , so be sure to avoid using floating-point variables"= =" or "! ="In comparison with numbers, you should try to convert them into">="or""forms. Because float will have an error. For example, if you assign a float a=0, a may be 0.000000001, there is an error, so use if( x = = 0) to judge, often will not set up. the float_acc

Pandas Warning: settingwithcopywarning

actually used to view the many times, is successful, but does not mean that every time can be successful, so the proposal should not ignore this warning).In summary, it should be possible to avoid using chained indexes to copy DataFrame. Detailed explanation of the cause of the alarm and the solution, you can refer to "returning a view versus a copy" under the "indexing and Selecting Data" module in the official Pandas document Http://pandas.pydat A.

A discussion on service-side rest and soap

modification of the resource (Put method), the Read (Handleget method), and the deletion (delete method), the Userresource class instance that was created is hosted by the Restlet framework. All methods of manipulating resources are automatically recalled after the corresponding HTTP request arrives.In addition, on the server side, also need to implement the resource class Userlistresource on behalf of the user list resource, its implementation is similar to Userresource, in response to the HTT

Primary key setting, overall int>guid/string

Primary key setting, overall int>guid/stringGeneral set int to primary key for higher efficiencyMysql:http://venublog.com/2010/04/19/choosing-the-right-data-type-makes-a-big-difference/http://venublog.com/2010/04/20/int-and-string-data-comparison-difference-in-performance-because-of-quotes/http://www.karafilis.net/sql-indexing-part4/Mssqlhttp://www.sql-server-performance.com/2007/datatypes/Http://bytes.com/topic/sql-server/answers/143943-int-versus-ch

Challenge Assumptions-especially Your Own

?Challenge Assumptions-especially Your OwnTimothy HighWethern's Law of SuSpEndEd judgment states (in a rather tongue-in-cheek fashion) that "assumption are the mother of all SC Rew-ups. " A more popular-take-on-this would is, "Don ' t assume-it makes an ' ' the ' u ' and ' Me '." If you're dealing with assumptions that could cost thousands, if not millions, of dollars it's not always a Laughin G matter.Best practices in software architecture State so should document the rationale behind each dec

PHP Execution Rate Optimization Tips Summary _php Tutorial

the constant name to lowercase (when making a second query) -Generate E_notice Warning -A temporary string is created Efficiency difference: 700%. Do not place the count/strlen/sizeof in the conditional statement for the For Loop Tips: My personal approach for ($i = 0, $max = count ($array); $i ?> Efficiency increases relative to: -Count 50% -Strlen 75% Short code is not necessarily fast Longest if ($a = = $b) { $str. = $a; } else { $str. = $b; } Longer if ($a = = $b) { $str.

Smackdown breaks to Vickie Guerrero along with GHD Australia online

Smackdown breaks to Vickie Guerrero along with GHD Australia online Dolph ziggler that comes these do-who's-That buy cheap GHD hair straighteners cheap GHD outlet you are. depending with a work set of the UN modern labor specialist, I wocould say some sort of situations as regards to work place Nuisance has mentioned significantly. it was not only a matter of combined concepts beside that limitation, it anxious new technology. because holy Huang blade versus

Game Engine architecture: URL list

://research.microsoft.com/en-us/um/people/hoppe/pm.pdf 10.1.2.5. TexturesHttp://en.wikipedia.org/wiki/S3_Texture_Compression 10.1.3.1. Local and Global Illumination modelsHttp://en.wikipedia.org/wiki/Rendering_equation 10.1.3.2. The Phong Lighting ModelHttp://en.wikipedia.org/wiki/Blinn%E2%80%93Phong_shading_model 10.2.6.4. Further readingHttp://developer.nvidia.com/object/cg_tutorial_home.html 10.2.7.4. Scene GraphsHttp://www.ccs.neu.edu/home/donghui/teaching/slides/geometry/BSP2D.pptHttp://www

How does the SharePoint search function work in a multi-language environment?

that are gathered when a document is crawler. after the initial crawl, the index engine uses word breakers and stemmers to further process the text and properties gathered during the crawl. the word breaker component is used to split the text into logical words and phrases. the index engine also removes "noise words" (that is, words that do not add value to a query) and creates an inverted index for full-text searching. Search query execution When a search query is executed for a given languag

Design Pattern -- 09. Structural. Compsite. Pattern (Delphi Sample)

methods [e.g.addChild(),removeChild()] Shocould normally be defined in the Composite class. unfortunately, the desire to treat Primitives and Composites uniformly requires that these methods be moved to the abstract Component class. see the "Opinions" section below for a discussion of "safety" versus "transparency" issues.Structure Composites that contain Components, each of which cocould be a Composite. Menus that contain menu items, each of which

[Reprint & Translation] Prototype Oriented

(the so-called family similarity), rather than originating from the taxonomy as representative as the delegated model. Another disadvantage is that, in the most naive implementations of this model, additional memory is wasted (versus the Delegation Model) on each clone for the parts that have stayed the same between prototype and clone. however, it is possible to provide concatenative behaviour to the programming while sharing implementation and data

Are you busy or productive?

From: http://xue.youdao.com/biarticle.a? ArticleID =-7109356361172425298 keyfrom = allinone date = Are you busy or productive? We all have those days that pass like a whirlwind. You don't get a free moment to catch your breath. You might even skip (or forget) to eat. At the end of the day, you feel like you have run a marathon. However, while you might have done has things, were they the right ones? Busy doesn' t mean productive You were busy yesterday, but were you productive? Even though you

Centos + nginx + php-fpm + php include fastcgi_params php page can be accessed but the page is blank. fastcgi_params and fastcgi. conf are miserable, and centosng.pdf

found any difference... It's all dizzy. Search for the two file names on the Internet and find out the differences between the two files; There is also a history. FASTCGI_PARAMS VERSUS FASTCGI.CONF – NGINX CONFIG HISTORYTweetThe nginx source install (and by extension package managers) includes two FastCGI configuration files, fastcgi_params and fastcgi.conf that differ only a tiny bit. To this day they still cause confusion amongst new users due to

With AOP, Component Oriented = Object Oriented

In my previous article "Component/Service Oriented Software System Development Thinking", I will collectively refer to the Software modules including BinaryLevel and Source Code Level as Component. This classification method is not very consistent with the traditional general definition of Component. This article is to explain why I want to classify it. -In the traditional definition, it is generally considered that there is an essential difference between Component Oriented and Object Oriented.

centos+nginx+php-fpm+php include fastcgi_params PHP page to access but blank, was fastcgi_params and fastcgi.conf harm dire

are really different;and another history.Fastcgi_params VERSUS FASTCGI. Conf–nginx CONFIG historytweetthe NGINX Source Install (and by extension package managers) includes, FastCGI Configur ation files, Fastcgi_params and fastcgi.conf that differ only a tiny bit. To the They still cause confusion amongst new users due to the package managers. The difference between the both files in the source install are the simple line Of:fastcgi_param script_filen

Centos + nginx + php-fpm + phpincludefastcgi_paramsphp page can be accessed but blank, and fastcgi_params and fastcgi. conf are miserable.

found any difference... it's all dizzy. Search for the two file names on the internet and find out the differences between the two files; There is also a history. FASTCGI_PARAMS VERSUS FASTCGI.CONF ? NGINX CONFIG HISTORYTweetThe nginx source install (and by extension package managers) includes two FastCGI configuration files, fastcgi_params and fastcgi.conf that differ only a tiny bit. To this day they still cause confusion amongst new users due

Item 38. Object Identity

"Who am I, really? "This problem addresses how to decide whether two pointers really refer to the same object. The"This! = Other"Test (partitioned strated below) is a common coding practice intended to prevent self-assignment. Is the condition necessary and/or sufficient to accomplish this? Why or why not? If not, how wocould you fix it? T T::operator=( const T other ) { if( this != other ) // the test in question { // ... } return *this;} Remember to Comment comment "protecting again

"Turn" BitKeeper and Linux,git prehistoric trivia

another. Larry McVoy said Linus also felt uncomfortable and complaining when he first started using BitKeeper. Before using BitKeeper, Linus's approach was to take a closer look at each patch, possibly extracting the part he needed-a job that was more difficult after bitkeeper. The end result, however, is that the maintainers of some subsystems are given greater trust, and Linus is able to check patches on a line-by-row basis. Linus a more trusted maintainer requires little scrutiny, and the c

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