# 25. The Wall Climber

> The cover shows three people cleaning high-altitude windows at Hangzhou EFC. It felt like watching real-life superheroes “walking on walls”—a mix of awe and deep respect!

- Issue: 25
- Published: 2021/05/11
- HTML: https://weekly.tw93.fun/en/posts/25
- JSON: https://weekly.tw93.fun/api/en/posts/25.json
- Chinese original: https://weekly.tw93.fun/posts/25.md

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<img src="https://gw.alipayobjects.com/zos/k/29/ZoRs7B.jpg" width="800" />

<small>The cover shows three people cleaning high-altitude windows at Hangzhou EFC. It felt like watching real-life superheroes "walking on walls"—a mix of awe and deep respect!</small>

> **Record the down-to-earth trending technologies seen every week, and publish them here after screening. If you find it good, you can follow this weekly to get update notifications.**

## Front-End Technology

**FlutterWeb in Meituan Waimai: Practice and Insights**  
<https://tech.meituan.com/2021/03/18/flutterweb-in-meituanwaimai.html>  
Learn how Meituan uses Flutter on the merchant side to ensure cross-platform consistency and boost iteration efficiency.

**Designing a Universal Bundler Based on esbuild**  
<https://juejin.cn/post/6940218189921910797>  
ByteDance's frontend team built a new universal bundler on top of esbuild, solving many of their internal performance bottlenecks.

**How QR Code Scanning Login Actually Works**  
<https://juejin.cn/post/6940976355097985032>  
One of those "I think I know, but do I really?" topics explained simply.

**Behind Safety: How Browsers Validate Certificates**  
<https://cjting.me/2021/03/02/how-to-validate-tls-certificate/>  
A deep dive into how browsers handle HTTPS and SSL/TLS certificates.

## Trending Open Source

**Hidden Bar: Hide macOS Menu Bar Items**  
<https://github.com/dwarvesf/hidden>  
An absolute essential for keeping a clean desktop. I use this every single day.  
<img src="https://gw.alipayobjects.com/zos/k/ad/pWC1zS.gif" width="800" />

**SwitchHosts: Quick Host Switching Tool**  
<https://github.com/oldj/SwitchHosts>  
A classic and must-have developer tool for managing different network environments.  
<img src="https://gw.alipayobjects.com/zos/k/br/CybaFK.jpg" width="800" />

**Netron: Visualizer for Neural Networks and Deep Learning Models**  
<https://github.com/lutzroeder/netron>  
A beautiful tool for visualizing complex AI and machine learning models.  
<img src="https://gw.alipayobjects.com/zos/k/ol/Cqg4nT.jpg" width="800" />

## Just Looking Around

**Monitoring iOS App Launch Time**  
<https://mp.weixin.qq.com/s/mxQpsenciOu9Qw9q-VTNyg>  
Launch time is a critical first impression for any app. This article explores how to monitor and optimize those crucial first seconds.

**Swift Async/Await is Here**  
<https://kemchenj.github.io/2021-03-06/>  
The Swift community is finally getting native async/await support—a massive win for developer productivity.

**Introducing /dev/null in Linux**  
<https://www.putorius.net/introduction-to-dev-null.html>  
A simple but powerful concept: the "black hole" device that discards everything written to it.

**A Conversation on Management from the Outside at Tencent**  
<https://mp.weixin.qq.com/s/kpS8RExdWMvvq-ce8G7qUQ>  
Real management is about creating maximum value from limited resources—a principle that applies as much to life as it does to business.