Performance analysis of XHProf

1. Install XHProf # page : https://pecl.php.net/package/xhprof wget http://pecl.php.net/get/xhprof-2.2.0.tgz tar -zxvf xhprof-2.2.0.tgz cd xhprof-2.2.0/extension cd xhprof-master/extension/ /usr/local/php/bin/phpize ./configure --with-php-config=/usr/local/php/bin/php-config --enable-xhprof make && make install 2. Install graphivz #Ins ...

Posted by adaykin on Wed, 25 May 2022 19:36:07 +0300

Implement the method of making the program wait for a period of time

JAVA background time waiting JAVA implements the method of making the program wait for a period of time. If you want the code to wait for a period of time before continuing to execute in JAVA, you can sleep the current thread for a period of time. 1. sleep method through thread try { Thread.currentThread().sleep(1000);//Wait 1 second } catc ...

Posted by XTTX on Wed, 25 May 2022 19:32:54 +0300

300 lines of code to realize the MVVM responsive principle of Vue

preface Source download Vue's responsive principle is an old interview question, and most people will choose to recite the answer directly to deal with the interview. Once the interviewer continues to ask questions, he can't answer anything. Therefore, I hope to write code (about 300 lines) to implement a simple Vue MVVM framework by referring ...

Posted by superdezign on Wed, 25 May 2022 19:16:48 +0300

[HAOI2015] tree dyeing

First of all, a simple idea is to make \ (dp_{i, j} \) as the maximum benefit of selecting \ (j \) black spots in the subtree with \ (I \) as the root, but you will find that no matter how to transfer this thing, it needs to involve depth and sum. If we record depth and sum, we can't pass this problem. We might as well split each side of each p ...

Posted by 947740 on Wed, 25 May 2022 19:14:42 +0300

JDBC operation data and DAO design pattern in actual combat

Using JDBC to manipulate data 1. Using JDBC to write large text data to the database Purpose: to java and other text files are written to the corresponding fields of the corresponding table by connecting the database with JDBC. 1. Table structure 2. Documents 3. Implementation code for inserting text package LoadFileTest; import driver.JDB ...

Posted by schoi on Wed, 25 May 2022 18:54:45 +0300

Didn't you say you would Aop?

Early in the morning, Xiao Wang hurried to me and said: brother Zhou, I want to ask about the function of logging. Because a project of the company needs to be connected with other platforms, we need to provide them with a set of interfaces. Yesterday, I assigned Xiao Wang to record the interface log. The following is my main conversation with ...

Posted by Emperio on Wed, 25 May 2022 18:24:15 +0300

Double stack sorting (bipartite graph coloring)

subject A very mellow topic Problem solution The key to this problem is to analyze whether two numbers can be on the same stack According to this logic, the general idea of this topic is: If a number xxx, 111~(x − 1)(x-1)(x − 1) has been popped up, then xxx will pop up, otherwise xxx will remain in the stack, and all subsequent numb ...

Posted by danrah on Wed, 25 May 2022 18:14:21 +0300

Dahua design mode reading notes (builder mode)

People: small dish, big bird Event: the small dish and the big bird went to have a snack. The small dish ate a bowl of delicious fried noodles, and then the big bird wanted to eat and ordered a bowl, but found that this bowl did not put salt. Why did the same cook cook cook fried noodles twice, the first bowl was delicious, but the second bowl ...

Posted by scm24 on Wed, 25 May 2022 18:14:28 +0300

Build your own MVC framework based on Koa2

Express and Koa are lightweight web frameworks. Although they are flexible and simple, and you can start the server in a few lines of code, with the complexity of the business, you will soon find that you need to manually configure various middleware. Moreover, because this kind of web framework does not restrict the directory structure of the ...

Posted by andymt on Wed, 25 May 2022 18:10:42 +0300

Remember a secondary development based on vant components

Introduction When developing the H5 project on the mobile phone, I chose the vue + vant ecosystem, and when using PullRefresh pull down refresh component, you need to customize the display. However, there are 3 pages under the home page Tab that need to be customized, and they are encapsulated as a component for convenience. source code The fol ...

Posted by acabrera on Wed, 25 May 2022 18:08:47 +0300