node.js - nodejs performance is poor

I am a beginner and found that the performance of nodejs is very poor! ! ! {Code...} Use the above code to traverse all the files in the home directory. There are only 140,000 files under /home. Nodejs will get stuck and die in the middle. Python can print all files to the console in 40 seconds. Nod...

过去多啦不再A梦 2017-06-20 10:06:41 0  3  1350

React performance issues?

Will it affect App performance if the component hierarchy is too deep? If so, how many levels will be generally set? Redux generates a new state through the reducer every time it takes an action. If there are more actions, there will be more state objects. Will this not affect performance? How is re...

伊谢尔伦 2017-07-05 11:02:11 0  3  951

Why thinkphp has better performance than laravel?

Why thinkphp has better performance than laravel? Why thinkphp has better performance than laravel? Why thinkphp has better performance than laravel? Why thinkphp has better performance than laravel? Why thinkphp has better performance than laravel? Why thinkphp has better performance than laravel? ...

马克战甲 2021-01-29 02:23:59 0  2  1745

javascript - Verification code countdown

{Code...} Please ask, after using this code, when the time times out, the method will automatically loop, but after deleting the setTimeout method, the code function cannot be realized. How to solve it?

阿神 2017-05-19 10:33:06 0  1  614

What is the code of conn.php

What is the code of conn.php in the second line of code in Voteset.php include('../conn.php');?

P粉464079466 2022-05-26 15:37:35 0  1  1003

java - What are the specific business usage scenarios of high-performance classes such as ConcurrentHashMap?

Like the question, what are the specific business usage scenarios of high-performance classes like ConcurrentHashMap? Usually when we write code, we usually use HashMap the most, and we are used to it. However, there are other high-performance Maps in Java, and I feel that we don’t usually use them....

给我你的怀抱 2017-06-28 09:23:10 0  4  1241

javascript - windows editor code snippet

Code snippets written on vscode can only be used on vscode; code snippets written on sublime can only be used on sublime. Is there a tool that can only write a code snippet and can be used in all editors? There is one on Mac. Is there such a tool on Windows?

高洛峰 2017-06-14 10:51:55 0  1  733

Teacher's code

Where is the teacher's code? I can't see it.

丶余生 2018-09-17 16:31:29 0  3  1429

Display of verification code

Why is the verification code not displayed and an error message appears when entering the verification code?

小王子。 2018-06-28 09:38:46 0  1  1150

code problem

Hello teacher, please send me a copy of the code that appears in this course. Thank you: 529830878@qq.com.

沉鱼落雁 2019-04-16 18:59:22 0  3  981

mvc - vue.js code improvement?

Is there any improvement in the above code?

世界只因有你 2017-05-16 17:05:33 0  1  555

vim - a piece of code to find code folding

Existing piece of folding code: {code...} Text before folding: Existing folding effect: My needs: As shown in the picture below, how to remove the excess part in front? If you remove it, it will look cleaner. I just started to get in touch with it. Vim, I hope you can give me some advice.

给我你的怀抱 2017-05-16 16:41:57 0  1  807

Source code of courseware meaning space

Where can I download the front and back code of Yi Space in the courseware?

小小蚊子 2017-09-16 18:02:37 0  2  1278

Performance impact of creating tables in SQLite

In SQLite, there is a CREATETABLEIFNOTEXISTS clause. I can't find a reason why this is not good to use performance-wise. For every SQLite query I call it beforehand to make things easier. Since SQLite is very fast, is there anything wrong with doing this? Is this just bad practice VS actually a perf...

P粉269847997 2024-01-29 00:19:04 0  1  492

java - trade-off between sql performance and high concurrency

SELECT {code...} It is possible to simply use multi-table association. If high concurrency is encountered, performance defects will appear immediately.

PHP中文网 2017-05-17 10:09:04 0  1  634

javascript - Vue v-if performance issue.

Like above, it's a comment, looped out. To determine which type it is, display the above content. Every 2 seconds the loop is different. Ajax requested data. According to the official, such frequent switching is very performance-intensive. But v-show cannot be used in this case, because v-show will ...

某草草 2017-05-18 11:03:09 0  1  873

symfony - doctrine ORM DBAL which performs better?

Which doctrine ORM DBAL has better performance and what application scenarios will they appear in?

滿天的星座 2017-05-16 16:44:07 0  1  609

javascript - Comparison of the running efficiency of these two pieces of JS code

Test environment {code...} The reason why this question is raised is because of a warning message from webstorm. {Code...} The above code will report a warning at the end of webstorm. The warning information is as follows: {Code...} According to the error message, the solution I thought of is to use...

巴扎黑 2017-07-05 11:07:16 0  7  1279

javascript - Is it good to use object literals to organize code?

{code...} Or {code...} Which of these two is better? The object method looks very clear, but there are many disadvantages in using it. For example, you have to put this in front of methods and variables. Will this increase unnecessary performance consumption? Will writing it as an object facilitate ...

伊谢尔伦 2017-06-12 09:28:53 0  3  689

javascript - If there is only one line of code but it is reused in many places, how to deal with this situation? Is it encapsulated into a global method, or is it written directly? ~

{Code...} If it is a code that jumps to a page, it will be executed after the login or certain logic is successful. Does it need to be encapsulated into a global method? Is just one sentence really necessary? In other words, making full use of the editor's global replacement and other functions can ...

ringa_lee 2017-07-05 11:00:17 0  5  1149