Performance Optimization

Advanced C++ Tutorial: Implementing Excel’s Grouping and Summarization Functionality

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Advanced C++ Tutorial: Implementing Excel's Grouping and Summarization Functionality

Hello everyone! Today, I will guide you through implementing the powerful grouping and summarization functionality in Excel using C++. 1. Core Idea of Grouping and Summarization Functionality The grouping and summarization in Excel mainly accomplishes three tasks: Grouping: Grouping data based on the values of specified columns Summarization: Performing statistical calculations (sum, average, etc.) for … Read more

Efficient C++ Practices: A Library Everyone Should Pay Attention To

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Efficient C++ Practices: A Library Everyone Should Pay Attention To

Hello everyone, I am Hai Di! In C++ development, string formatting is a frequent and easily overlooked requirement. Traditional methods such as <span>sprintf</span> pose risks of buffer overflow, while <span>iostream</span> has poor performance and cumbersome syntax. The fmt library, with its three main features of type safety, zero-cost abstraction, and minimal syntax, has become the … Read more

Summary of Troubleshooting 100% CPU Usage on Linux

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Summary of Troubleshooting 100% CPU Usage on Linux

Follow “Java Matters” and select “Star” to receive a free Java book package, whether you are a newcomer or an experienced developer in this new era.Source: Online. When your server’s CPU reaches 100%, how do you troubleshoot the abnormal fault? At the end of this article, a shell script will be shared to help you … Read more

The Perf Tool in Linux Kernel: An Analysis of Its Implementation Principles

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The Perf Tool in Linux Kernel: An Analysis of Its Implementation Principles

[Image] In the vast realm of the Linux kernel, performance optimization and fault diagnosis stand as two towering peaks, obstructing the path of developers. To scale these two heights, developers are constantly in search of powerful tools. Among them, perf is undoubtedly one of the most dazzling “artifacts.” When running a complex Linux system, have … Read more

Optimizing Compute-Intensive Tasks in Go: Parallel Processing with SIMD Instruction Sets for 4x Speedup

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Optimizing Compute-Intensive Tasks in Go: Parallel Processing with SIMD Instruction Sets for 4x Speedup

Click the “blue text” above to follow us Have you ever had this experience? You wrote a program to process a large amount of data, went to make a cup of coffee, and came back to find the program still “buzzing” away. Anxiously waiting, you finally conclude: the performance is lacking! Especially when dealing with … Read more

Efficient Combination of mmap and Socket in Embedded Linux

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Efficient Combination of mmap and Socket in Embedded Linux

Hello everyone, I am the Information Guy~ In the pursuit of extreme performance in server development, how to reduce the number of data copies and lower CPU usage is an eternal topic. Today, I will introduce the combination of <span><span>mmap</span></span> and <span><span>socket</span></span>, which is a powerful tool to address this pain point, and has been … Read more

Interview Experience for Embedded Linux Positions at Hesai Technology

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Interview Experience for Embedded Linux Positions at Hesai Technology

Click on the above“Embedded Linux Charging Station”, select“Pin/Star the Official Account” Welfare and valuable information delivered promptly First Interview 1. Self-introduction 2. What kind of locks are used in interrupts? 3. What is the difference between spin locks and mutex locks? 4. If the interrupt function is threaded, what kind of locks should be used? … Read more

In-Depth Analysis of Zephyr Code Relocation Technology: From Principles to Best Practices

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In-Depth Analysis of Zephyr Code Relocation Technology: From Principles to Best Practices

In modern embedded system development, code relocation technology is becoming a key means to optimize system performance. Imagine a scenario where your real-time control system experiences a 30% delay in critical interrupt response due to Flash access latency, or is unable to add new functional modules due to Flash capacity limitations. These are the pain … Read more

How to Prevent Memory Leaks in Embedded Programming?

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How to Prevent Memory Leaks in Embedded Programming?

1. Introduction Recently, various products in our department have encountered issues caused by memory leaks, specifically manifested as board resets after continuous operation for several days due to memory exhaustion. On one hand, memory leak issues are considered low-level errors, and their oversight in production can have severe consequences; on the other hand, since memory … Read more

Java Vectorization Programming: Accelerating Image Processing Algorithms with SIMD Instructions

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Java Vectorization Programming: Accelerating Image Processing Algorithms with SIMD Instructions

Click the blue text to follow! Java Vectorization Programming: Accelerating Image Processing Algorithms with SIMD Instructions Hello, programmers! Feng is back! Today, let’s talk about something exciting—Java vectorization programming. Don’t be intimidated by this fancy name; it’s simply a black technology that makes your Java code fly! Especially when processing images, the acceleration effect is … Read more