Backend developers often have to decide on a primary key: auto increment or UUID? What about collisions? How much faster is UUIDv7 compared with created_at + index? After benchmarking 20 million rows and looking at the design trade-offs, this post gives you the answer.
Huffman coding is one of the most classic lossless compression algorithms in information theory. Starting from the concept of information content, this article breaks down the principles of Huffman coding step by step, and includes an interactive tool so you can try it yourself.
Everyone is familiar with JPG, but there are many compression techniques behind it worth learning from. This article breaks down JPEG’s compression principles step by step—from the YCbCr color space and discrete cosine transform to quantization tables and Huffman coding—and includes an interactive DCT visualization tool.
With the dramatic progress of LLMs, the shape of software development has already been completely transformed; building an application now has almost no barrier to entry.
Sunwide View and Vigilante Justice
Spring and Shura
Tang poetry is pretty suitable for working people to read, right? The more miserable someone’s life is, the better their poetry seems to be written. Looking at how pitiful they were can help us reflect on ourselves.
Write on manuscript paper, scan it, and turn it into an image
There are no second chances in life. Every resignation teaches us plenty, and slowly helps us understand the strengths we can play to. But before you quit, have you really thought it through? In this post, I’ll share some hard-earned lessons from the front lines as a developer, as a guide for my future self and in the hope that it helps anyone who has ever felt torn about whether to leave.
In the AI era, the key to startup success is industry insight. Many execution-related tasks can be handled by experienced engineers, which makes me question whether a CTO is truly necessary.
Some old writing habits I’ve picked up over the years—I had AI analyze them, and it also happened to spark some thoughts about a recent change in my mindset.
I really dislike using Google Analytics. Besides being clunky to use, it has so many features that it’s overwhelming, and the dashboard interface and loading speed are so complicated that I don’t even want to open it. Until I finally found the ideal service a few years ago—Plausible.
By default, underlines sit very close to the text, and some designers dislike this style. Personally, I don’t think it looks very good either.
"I really like a scene from *Frieren: Beyond Journey's End*.
Sharing some of the insights and thoughts I’ve had after turning thirty
My wish for 2025, made in 2024, was to no longer have to return to office work and still be able to support myself. I didn’t quite achieve that goal, but I would say 2025 was one of the years in which I grew the most.
Digging out your own strengths and weaknesses is a difficult thing. In Chinese-speaking societies, it’s probably hard to hear someone sincerely praise one of your skills, and I often even notice a phenomenon where people put themselves down to seem less ostentatious. I’m one of those people too, but recently I’ve been trying to change.
*The Essence of Failure* is a very well-known book in Japan. By analyzing the various defeats of the Japanese Army and Navy during World War II, the author holds up a mirror to show how an organization can gradually weaken itself through its systems, culture, and processes.
Only pay attention to Pixel Perfect when it really matters; otherwise, it often leads to a lose-lose situation.
If you’re often curious about what other people think, there’s a good chance you’ve already grasped the essence of communication. If you often think other people are idiots and that your own solution is the only correct one, there’s a good chance you still don’t know how to communicate.