Speaking of performance optimization, I would like to ask, what is performance optimization? What is your understanding?
**First of all, what is performance: **In the same mobile phone, the app with the same function, which runs fast, which is not stuck, and whichever is high performance. Our article is to solve those slow performance problems:
1) We need to find the places with low performance, and solve these places, this is the performance optimization;
2) We need to equip ourselves with the code we wrote at the beginning. It runs with high performance, so this is the design idea and code quality optimization. Whether an app’s performance is good or not, we need to work on two levels.
**The first level: **You need to pay attention when writing code. Make your own code high-performance and high-availability code. This process is to write high-
performance code;
**The second level: **The right has been formed The code uses tools to check code problems, and guides us to delete and modify the code through the checked problems. This process is called tuning.
Most developers know how to write high-performance code? First of all, you need to have a deep code foundation, which is the basis of the code, such as:
The data structure can write a special structure that meets the current scenario according to the application scenario. For example, Google has developed sparseArray instead of HashMap for the characteristics of the Android platform. In addition, he has his own unique insights into commonly used algorithms. There are hundreds of questions on LeetCode, so that you can almost achieve the ability to be proficient in the most commonly used algorithms such as sorting and searching dynamic programming.
Furthermore, if efficient algorithms and memory-saving data structures are matched with excellent design patterns that meet application scenarios, these provide a basis for high-performance code.
It doesn’t matter if you don’t understand, you don’t get the essence. Today, let’s appreciate the gossip of the whole network ** [Design Ideas and Code Quality Optimization + Program Performance Optimization + Development Efficiency Optimization] **Android Performance Tuning Cheats
Instead of complaining, improve yourself
Compared with previous years, the difficulty of interviews has increased a lot. You said that with so many programmers now, your delivery company may have 300 people delivering with you, but they only recruit 5 people. What should I do? Resume PASS dropped a lot, and then the interview again PASS dropped a lot. From this point of view, the popular saying now: "Interview makes rockets, work screws" is still very reasonable. It is only to increase the difficulty of interviews to recruit the people you need from many people.
Many people complain that jobs are getting harder and harder to find now. Indeed, the Internet industry is not as easy to find a job as it used to be. I think a large part of the reason is that too many half-way programmers have been trained in the current training courses. The training courses have lured many people into this circle with the title of guaranteeing your high-paying employment. I am not biased against people who are halfway through the family, but the fact is that some people who come out of the training courses are really not competent for many jobs. One is that most of the training courses are very motivated. To put it bluntly, many training courses are for collecting money; the second is that the foundation of a half-way renunciation must be that there is no good person who has not studied computer knowledge in a big way. This has resulted in many training courses. It is difficult for people born to move forward; third, the Internet industry does have a partial preference for young people. After all, college students who have just graduated are relatively cheap, but the Internet industry does not eat youth.
Therefore, whether it is a birth in a training course, a fresh graduate or a small partner who has been working for a few years, you must have a clear understanding of yourself, figure out what you lack, and figure out your own advantages (why the company should recruit you). After you know your shortcomings, you must work hard!
The Internet industry is actually quite fair. Although your academic qualifications will be used as a reference during the interview, if your abilities are really good and your resume is really rich, interviewers will still appreciate such candidates.
How to improve personal hard power?
The personal hard power I am talking about here refers more to personal professional abilities, such as the ability to build high-quality websites or the mastery of professional knowledge.
I think whether for a novice or a veteran, the most important thing to improve your personal hard power is to continuously study and practice the theory. It is best to put the theory into practice in a specific project.
A suggestion to students who are still in school: If possible, try to participate in some competitions. Maybe your skills are not very good. You still hesitate in your heart whether you have the ability to participate in the competition, but I still recommend you to go. try it.
why? The preparation time for a competition is 5 to 6 months if it is longer, and 2 to 3 months if it is shorter. Before participating in this competition, you may not have actually applied many of the techniques used in the competition, or even listened to it. But these few months should be enough for you to study. If your attitude is good and your self-learning ability is not bad, there is generally no problem.
In the end, you may not get an excellent ranking, but I think the experience of participating in the competition is the most helpful to you. If you will participate in other competitions later, I think you will do better and better.
In addition to competitions, actual projects are also very important for improving and exercising one's personal abilities.
Practice more and apply what you have learned to actual projects. Many people have come to me complaining that there is no actual project for them to do. Below I will introduce several ways that you can have project experience. Project experience is very important for the improvement of technical skills and interviews.
At last
Due to the length of the article, I only listed the interview questions. The detailed answers were compiled into a PDF document. This document also includes advanced architecture technology advanced brain maps, Android development interview topics , and advanced The advanced structure information helps everyone learn to improve the advanced level, and also saves everyone's time to search for information on the Internet to learn.
Friends who need it can send me a private message [answer] or click here to receive it for free