# 44. Limbo Girl

> The “Limbo Girl” statue at Intime City. Hubby and cute, she really adds some character to the sidewalk.

- Issue: 44
- Published: 2021/09/21
- HTML: https://weekly.tw93.fun/en/posts/44
- JSON: https://weekly.tw93.fun/api/en/posts/44.json
- Chinese original: https://weekly.tw93.fun/posts/44.md

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<img src="https://gw.alipayobjects.com/zos/k/uf/TfA0xA.jpg" width="800" />

<small>The "Limbo Girl" statue at Intime City. Hubby and cute, she really adds some character to the sidewalk.</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

**Tracking Users in Browser Incognito Mode: A Front-End Perspective**  
<https://segmentfault.com/a/1190000040475726>  
Is incognito mode really invisible? This article breaks down the technical reality of fingerprinting and tracking beyond just cookies.

**Audio Visualization: Sampling, Frequency, and Fourier Transforms**  
<https://cjting.me/2021/08/07/fourier-transform-and-audio-visualization/>  
A substantial piece bridging physics and programming to explain how audio data becomes visual art.

**Innovative Ways to Use Skeleton Screens**  
<https://juejin.cn/post/6994678354200756238>  
Everything you didn't know you needed to know about building better loading experiences.

**Essential Docker Commands for Daily Use**  
<https://juejin.cn/post/6996126578048499743>  
Keep this as a reference for the next time you need to manage your containers without googling every flag.

## Trending Open Source

**stats: macOS System Monitor for the Menu Bar**  
<https://github.com/exelban/stats>  
A great open-source alternative for tracking CPU, RAM, and network usage directly in your menu bar.  
<img src="https://cdn.tw93.fun/blog/upic/zRLMd2.jpg" width="800" />

**mitmproxy: SSL/TLS Proxy and Packet Capture**  
<https://github.com/mitmproxy/mitmproxy>  
An interactive man-in-the-middle proxy. It’s perfect for inspecting App API calls.  
<img src="https://cdn.tw93.fun/blog/upic/m7aeau.gif" width="800" />

**Flat: Open Source Web/Desktop Classroom Platform**  
<https://github.com/netless-io/flat>  
A polished and open-sourced virtual classroom for web and desktop, powered by Agora.  
<img src="https://cdn.tw93.fun/blog/upic/3N3IEY.jpg" width="800" />

**JSZip: Creating and Editing .zip Files in JavaScript**  
<https://stuk.github.io/jszip/>  
A robust library for handling zipping and unzipping logic directly in your frontend or Node.js environment.

**The 2021 JavaScript Ecosystem Survey Report**  
<https://www.jetbrains.com/lp/devecosystem-2021/javascript/>  
The annual deep dive from JetBrains. Their [Python report](https://www.jetbrains.com/lp/devecosystem-2021/python/) is also worth a look.  
<img src="https://cdn.tw93.fun/blog/upic/if7vg4.jpg" width="800" />

## Just Looking Around

**Optimizing iOS App Launch Speed at Maimai**  
<https://zhuanlan.zhihu.com/p/396550853>  
A look from the iOS trenches on how to achieve near-instant startup times. The technical diagrams are exceptionally clear.

**Monitoring App Crashes and Freezes: Best Practices**  
<https://juejin.cn/post/6995073965903331365>  
The Bytedance team shares their experience in tracking down and solving "ANR" style freezes in iOS.

**Introduction to Pre-Sales Engineering**  
<https://read.douban.com/reader/ebook/322579268/>  
A free introductory guide to the world of ToB sales engineering. Surprisingly relevant even if you are purely on the technical side.