Hello, I am safe and sound. Article directory How to perform mathematical calculations, string processing and conditional judgment? Math functions String functions conditional judgment function Summarize How to perform mathematical calculations, string processing and conditional judgment? MySQL provides many functions that are powerful and very convenient to use, including mathematical functions, string processing functions, and […]
Tag: perf
Android performance optimization series apk slimming
Why APK needs to be slimmed down. The larger the APK, the more traffic they will consume during the download and installation process, and the longer the installation waiting time will be; for the product itself, it means that the download conversion rate will be lower (because users have more opportunities to choose among competing […]
The perfect combination of Redis and Spring Boot: the black technology of Lua scripting
Source: blog.csdn.net/Mrxiao_bo/article/details/133783127 There once was a magician who was good at combining two powerful tools, Spring Boot and Redis, into an amazing combination. His magic weapon is Redis’s Lua script. Today, we will uncover the secrets of this magician and explore how to use Lua scripts in Spring Boot projects to unlock new possibilities and […]
.NET high-performance development-bitmap index
First, let’s assume such a business scenario. Everyone should be familiar with air tickets. When purchasing air tickets, you first select your desired departure and arrival city and time, then select the cabin class (business class, economy class), and click Query. A flight list will appear. If you click on a flight at will, you […]
postgresql|database|materialized view analysis to improve query performance
Foreword: We generally think that the digital world is a virtual world, OK, but in fact some of our needs are exactly the same as those in the real world. For example, for databases, especially relational databases, we hope that the databases we use can be faster (query speed) , higher (higher performance limit), stronger […]
[c++] In-depth analysis of your favorite stringstream and snprintf performance
I recently wrote two similar modules in a program. One uses snprintf to output intermediate data, and the other uses stringstream lazily. And guess what? The frame is actually pressed! ! Who is holding back performance? Performance analysis experiment from Alibaba Cloud I searched online and found that someone had done a performance analysis experiment. […]
Linux implementation principle – multi-thread scheduling overhead and performance optimization in NUMA multi-core architecture
Foreword NOTE: The “thread” referred to in this article refers to the executable scheduling unit Kernel Thread. NUMA Architecture The design concept of NUMA (Non-Uniform Memory Access, non-uniform memory access) is to partition the CPU and Main Memory autonomously (Local NUMA node), and to cooperate across regions (Remote NUMA node), in this way to alleviate […]
24 | See how to quickly develop big data systems from the big data performance testing tool Dew
In this issue of Spark performance optimization case analysis, through visual analysis of a large number of Spark server performance data, we discovered various performance problems of Spark in the program code and operating environment, and made corresponding optimizations to improve Spark operating efficiency. Has been greatly improved. Many students are also asking, where do […]
20 | Spark performance optimization case analysis (Part 2)
In the last issue, we talked about software performance optimization that must be conducted through performance testing and based on an understanding of software architecture and technology. Today, we use several Spark performance optimization cases to see how the performance optimization principles mentioned are implemented. If you forget the principles of performance optimization, you can […]
Escape Analysis: The secret key to unlocking performance!
High-quality blog posts: IT-BLOG-CN Interviewer pitfall: Do newly created objects in Java necessarily allocate memory on the heap? If your answer is “Yes” then you need to read this article. 1. Introduction Escape Analysis Escape Analysis: It is a very important JIT optimization technology, used to determine whether the object will be accessed outside the […]