Which PHP Tailing Method is Best for Performance?
Tailing Files Effectively in PHP: A Performance Analysis
Introduction
Retrieving lines from the end of a file, known as tailing, is a common task in PHP applications. While various methods exist, it's crucial to determine the most efficient approach, especially for handling large files. This article explores five tailing solutions, analyzing their performance through extensive testing.
Overview of Methods
- Naive: Utilizes the file() function, but can encounter memory limits.
- Cheating: Leverages the tail command, but may fail on non-Unix systems or environments with system function restrictions.
- Mighty: Manually reads bytes or multi-byte buffers from the end of the file.
Performance Tests
To evaluate the solutions, a series of tests were conducted on sample files ranging from 10KB to 10MB. Each test measured the average elapsed time for retrieving 1 to 1000 lines from the end of each file.
Results
For 100KB files:
- Solutions 4 and 5 (multi-byte buffered) performed best, with a slight advantage for 5 due to its dynamic buffer size.
- Solution 1 (naive) and 2 (cheating) proved less efficient.
For 10MB files:
- Solution 5 continued to excel, while solution 1 became significantly slower due to memory limitations.
For 10KB files:
- Solution 1 surprisingly became the fastest, as loading such a small file into memory was efficient.
Conclusion
For general use cases involving various file sizes, Solution 5 (modified dynamic buffer) is highly recommended. It offers consistently good performance, particularly when retrieving a few lines.
Considerations
- Avoid solution 1 for files larger than 10KB.
- Solution 2 and 3 are less efficient in general, although solution 3 may be suitable for reading a few lines from small files.
Further Resources
- Test files, sources, and results: https://www.lorenzostanco.com/stack/test_tail_100k.png
The above is the detailed content of Which PHP Tailing Method is Best for Performance?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1378
52
Alipay PHP SDK transfer error: How to solve the problem of 'Cannot declare class SignData'?
Apr 01, 2025 am 07:21 AM
Alipay PHP...
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
Explain the concept of late static binding in PHP.
Mar 21, 2025 pm 01:33 PM
Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo
Framework Security Features: Protecting against vulnerabilities.
Mar 28, 2025 pm 05:11 PM
Article discusses essential security features in frameworks to protect against vulnerabilities, including input validation, authentication, and regular updates.
Customizing/Extending Frameworks: How to add custom functionality.
Mar 28, 2025 pm 05:12 PM
The article discusses adding custom functionality to frameworks, focusing on understanding architecture, identifying extension points, and best practices for integration and debugging.
How to send a POST request containing JSON data using PHP's cURL library?
Apr 01, 2025 pm 03:12 PM
Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...
Describe the SOLID principles and how they apply to PHP development.
Apr 03, 2025 am 12:04 AM
The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.
What exactly is the non-blocking feature of ReactPHP? How to handle its blocking I/O operations?
Apr 01, 2025 pm 03:09 PM
An official introduction to the non-blocking feature of ReactPHP in-depth interpretation of ReactPHP's non-blocking feature has aroused many developers' questions: "ReactPHPisnon-blockingbydefault...
