It is more amazing given that QuickJS is not a single feat but a cumulation of his older projects, each of them is great by itself:

- TCC [1]: Of course, QuickJS is not the first language implementation he's written.

- Pi calculation [2]: Once the world record holder (and opening the era of pi computation in commodity PCs), this surely inspired his next great invention:

- LibBF [3]: A good and small arbitrary-precision number library. I think LibBF is a byproduct of NumCalc [4], and he has probably seen a way to the full language implementation using LibBF later (the current version of NumCalc is indeed based on QuickJS, sharing the technique used in the current version of JSLinux [5]).

[1] https://bellard.org/tcc/

[2] https://bellard.org/pi/

[3] https://bellard.org/libbf/

[4] http://numcalc.com/

[5] https://bellard.org/jslinux/

Wow. I had no idea that both ffmpeg and qemu was two of the things Bellard created. https://smartbear.com/blog/test-and-monitor/fabrice-bellard-...

He has developed a ton of stuff! What I found particularly impressive is the PC Emulator developed in Javascript which runs Linux within a browser!

https://bellard.org/jslinux/

You can actually run X-Windows, Windows 2000, FreeDOS etc in a browser using this.

His implementation of 4G LTE purely in software is also pretty amazing. https://bellard.org/lte/

His other projects: https://bellard.org/

Incredible is an appropriate word to describe these projects: A self-compiling C compiler in 2048 bytes of C source code.

https://bellard.org/otcc/

The wonders of Bellard never cease. Another discovery for me was that he wrote LZEXE in 1989~90 when he was 17. I remember this program from my childhood.