Article Introduction：The Scrapy framework is an open source Python crawler framework that can be used to create and manage applications that crawl data. It is one of the most popular crawler frameworks currently on the market. The Scrapy framework uses asynchronous IO for network requests, which can efficiently capture website data and has the advantages of scalability and stability. This article will deeply analyze the characteristics and advantages of the Scrapy framework, and illustrate its efficient and stable operation through specific code examples. Simple and easy to learn Scrapy framework uses Python language, learn

2024-01-19 comment 0  1194

Article Introduction：mysql优化（2）索引优化 配置优化

2016-06-01 comment 0  916

Article Introduction：scrapy custom crawler-crawl javascript content

2016-10-17 comment 0  1319

Article Introduction：Scrapy is a very useful Python crawler framework that helps us obtain data from different websites easily. At the same time, more and more users of Scrapy are using it to crawl data. Therefore, in the process of using Scrapy, we need to consider how to optimize our crawlers so that we can crawl the required data more efficiently. This article will share some tips for crawler optimization in Scrapy. Avoid duplicate requests When we use Scrapy to crawl web page data, we may

2023-06-23 comment 0  1612

Article Introduction：【MySQL优化】MySQL GROUP BY 操作的优化

2016-06-01 comment 0  949

Article Introduction：Scrapy is one of the most popular crawler frameworks in Python. It can help users quickly build crawlers and improve crawler efficiency. The automatic deployment of Scrapy to the server can make it more convenient for users to deploy and manage crawler programs. This article will introduce how to automatically deploy Scrapy to the server. 1. Preparation tools To automatically deploy Scrapy to the server, we need some tools. These tools include: Git: version control tool for managing code between local and server. SSH

2023-06-22 comment 0  1343

Article Introduction：Website performance optimization mainly optimizes page loading speed optimization, database optimization, server optimization, front-end optimization, etc. Detailed introduction: 1. Page loading speed optimization. Page loading speed is one of the key indicators of website performance. Users have extremely high expectations for the loading speed of web pages. If the web page loads too slowly, users are likely to choose to leave; 2. Database Optimization, the database is the core component of the website backend and has an important impact on website performance; 3. Server optimization, the server is the infrastructure for website operation and plays a vital role in website performance, etc.

2023-10-13 comment 0  646

Article Introduction：1. First click [Windows Optimization Master]. 2. Then in the [Windows Optimization Master] window, click [File System Optimization]. 3. Then in the [File System Optimization] window, check [Allow Windows to optimize the hard drive in the background when idle]. 4. Finally, click [Optimize].

2024-04-30 comment 0  580

Article Introduction：Optimizing C++ functions follows the principles: optimize critical path code, focus on hot functions, and balance performance and readability. Common optimization techniques include: inlining functions to eliminate function call overhead; reducing indirect calls to improve direct access speed; optimizing loops to improve efficiency; virtual function rewriting to prevent indirect calls; using object pools to avoid frequent memory allocation.

2024-05-01 comment 0  920

Article Introduction：Windows Optimization Master provides a variety of functional modules, which can effectively detect and optimize the computer. Does anyone know how Windows Optimization Master automatically optimizes the boot partition? Here I will give you a detailed introduction to how Windows Optimization Master automatically optimizes the boot partition. Friends who need it can take a look. Operation method: 1. Double-click to open the software and click the "File System Optimization" option on the left. 2. Then find the "Allow Windows to automatically optimize the boot partition when needed" on the right and check the small box. 3. Finally, click the "Optimize" button on the right.

2024-08-07 comment 0  401

Article Introduction：C++ function optimization will usher in trends such as native support, prediction-based optimization and cross-language optimization in the future. New technologies include stream-based optimization, which allows functions to be optimized in real time; guided optimization, which provides user-provided compile-time guidance; and a trusted execution environment, which enhances security and allows aggressive optimization.

2024-05-01 comment 0  915

Article Introduction：MySQL优化之数据库结构：数据对象优化

2016-06-01 comment 0  1073

Article Introduction：How to measure the effect of C++ function optimization: Use performance analysis tools to generate execution time reports. Run microbenchmarks to measure the performance of a specific function or block of code. Analyze function algorithm complexity to estimate improvement after optimization. Practical case: Optimizing Fibonacci function Before optimization: The recursive function has high complexity. After optimization (using memoization): Reduce time complexity by avoiding repeated calculations. Effect measurement: Using micro-benchmark testing, the performance is significantly improved after optimization.

2024-05-02 comment 0  739

Article Introduction：当你提交一个查询的时候，MySQL会分析它，看是否可以做一些优化使处理该查询的速度更快。这一部分将介绍查询优化器是如何工作的。如果你想知道MySQL采用的优化手段，可以查看MySQL参考手册。 当然，MySQL查询优化器也利用了索引，但是它也使用了其它一些信息。例如，如

2016-06-01 comment 0  894

Article Introduction：Optimizing JavaScript for Performance JavaScript is a versatile and powerful language, but it can also be a source of performance bottlenecks if not optimized correctly. In this article, we will explore several key techniques to optimize JavaSc

2024-07-19 comment 0  447

Article Introduction：MySQL查询优化系列讲座之查询优化器(1)

2016-06-01 comment 0  859

Article Introduction：MySQL查询优化系列讲座之查询优化器(2)

2016-06-01 comment 0  973

Article Introduction：【MySQL优化】优化Linux读取性能，不使用atime属性

2016-06-01 comment 0  1045

Article Introduction：PHP website performance optimization involves network communication optimization, including the use of persistent connections, Pipelining, optimizing HTTP headers, and using HTTP caching to reduce request overhead, increase response speed, and increase throughput. In practical applications, an e-commerce website reduced the average page loading time by 20% through these technologies. Specific effects include: persistent connections reduced the average request time to 50 milliseconds, Pipelining reduced the page loading time by 15%, and HTTP headers Optimization reduces response size by 12%, and HTTP caching reduces server request times by 30%.

2024-06-04 comment 0  778