Moondrop has released the Block true wireless earbuds for audio enthusiasts that sit comfortably in the outer ear. Unlike earbuds jammed into ear canals, the Block does not cause a plugged ear feeling or collect ear wax. The 13 mm driver is enclosed

The thing is actually like this. At that time, my leader gave me a perf hardware performance monitoring task. During the process of using perf, I entered the command perf list and I saw the following information: My task is to enable these cache events to be counted normally. But the point is, I have no idea what these misses and loads mean.

The difference between insertignore, insert and replace instructions already exist or not. Example of insert error. Insertintonames(name,age)values("Xiao Ming", 23); insertignore ignores insertignoreintonames(name, age)values("Xiao Ming", 24); replace Replace and insert replaceintonames(name,age)values("Xiao Ming", 25); table requirements: PrimaryKey, or unique index result: the table id will be automatically incremented. Test code creates table

Use java's StringBuilder.insert() function to insert a string at a specified position. StringBuilder is a class in Java used to handle variable strings. It provides a variety of methods to operate strings. The insert() function is used to insert strings at specified positions. One of the common methods of positionally inserting strings. In this article, we will introduce how to use the insert() function to insert a string at a specified position and give corresponding code examples. insert()

Characteristics of cache: A one- or two-level high-speed, small-capacity memory set between the CPU and the main memory. The information is naturally lost when the computer is powered off. Characteristics of ROM: it can only read data from the memory, but cannot write information into it. The data will still exist after the computer is powered off. Characteristics of ram: it can read data from the memory and write information to the memory; it is used to store commands, programs and data required to run the program; information is naturally lost when the computer is powered off.

Using the cache can increase the speed of the computer because the cache shortens the waiting time of the CPU. Cache is a small but high-speed memory located between the CPU and the main memory DRAM. The function of Cache is to increase the rate of CPU data input and output; Cache has a small capacity but fast speed, while the memory speed is low but has a large capacity. By optimizing the scheduling algorithm, the performance of the system will be greatly improved.

Here is the tutorial for nginx reverse proxy caching: Install nginx: sudoaptupdatesudoaptinstallnginx Configure reverse proxy: Open nginx configuration file: sudonano/etc/nginx/nginx.conf Add the following configuration in the http block to enable caching: http{...proxy_cache_path /var/cache/nginxlevels=1:2keys_zone=my_cache:10mmax_size=10ginactive=60muse_temp_path=off;proxy_cache

Preface Caching can effectively improve system performance and stability by storing frequently accessed data in memory, reducing the pressure on underlying data sources such as databases. I think everyone has used it more or less in their projects, and our project is no exception. However, when I was reviewing the company's code recently, the writing was very stupid and low. The rough writing is as follows: publicUsergetById(Stringid){Useruser=cache. getUser();if(user!=null){returnuser;}//Get user from the database=loadFromDB(id);cahce.put(id,user);returnu