This is the first article in the “Systrace Thread CPU State Analysis Tips” series. It analyzes the causes of the “Runnable” state in Systrace and provides optimization strategies for when Runnable segments are excessively long.

The goal of this series is to use Systrace to view the Android system from a different perspective and to learn the Framework through visualization. While reading Framework source code can be difficult to remember, seeing the flow in Systrace can lead to deeper understanding. You can find the complete Systrace Basics and Action Series here.

In his book Hackers & Painters, Paul Graham asserted, “The disparity in the efficiency of languages is becoming more pronounced, hence the rising importance of profilers. Currently, performance analysis isn’t given the attention it deserves. Many still seem to hold onto the belief that the key to accelerating program execution lies in developing compilers that generate faster code. As the gap between code efficiency and machine performance widens, it will become increasingly apparent that enhancing the execution speed of application software hinges on having a good profiler to guide program development.” by Paul Graham, Hackers & Painters

Search for “Android optimization tools” and you’ll find plenty of articles. Many repeat the same material or go straight to instructions without explaining how the tools fit together. It is easy to come away thinking one tool can solve everything. Our team’s experience says otherwise: there is no silver bullet. Tools change, and familiar problems return in new forms. You still need to understand what is happening underneath.

We’ll start with the data we collect, how we collect it, and how we analyze it. Then we’ll look at Google’s traditional “big three” performance tools. We want you to understand the measurements as well as the tools, and save yourself some of the detours others have already taken.

In his book , Paul Graham states: “The execution efficiency gap between different programming languages is becoming increasingly large, so profilers are becoming more important. Currently, performance profiling is not receiving enough attention. Many people still believe that the key to improving program running speed is developing compilers that can generate faster code. The gap between code efficiency and machine performance is continuously increasing, and we will increasingly clearly see that the key to improving application software running speed is having a good performance profiler to guide program development.”

By Paul Graham — Hackers and Painters

Search for “Android optimization tools” and you’ll find plenty of articles. Many repeat the same material or go straight to instructions without explaining how the tools fit together. It is easy to come away thinking one tool can solve everything. Our team’s experience says otherwise: there is no silver bullet. Tools change, and familiar problems return in new forms. You still need to understand what is happening underneath.

We’ll start with the data we collect, how we collect it, and how we analyze it. Then we’ll look at Google’s traditional “big three” performance tools. We want you to understand the measurements as well as the tools, and save yourself some of the detours others have already taken.

2021 has passed. Taking advantage of the New Year holiday, I’d like to look back at the year. This will be a casual review—writing whatever comes to mind. 2021 for me was marked by becoming a father, changing jobs (including a long, boring spell at home in between), and making new friends. Overall, it was a pretty good year.

However, in terms of personal growth, I feel like I might have stagnated or even regressed, which is a bit alarming. Learning is like rowing upstream; if you don’t move forward, you fall back. In 2022, I need to spend more time working through things properly. I hope to progress together with everyone reading this.

I’ve also tallied some data related to my technical sharing, shared my income from these platforms, and listed some hardware and software I recommend. Feel free to take a look.