minimal Bun build?

[leeoniya]

What is the problem this feature would solve?

Bun binary big

What is the feature you are proposing to solve the problem?

are there any plans to make Bun itself strippable of features that are unused by some set of scripts?

how much can the binary shrink if it only included JSC and things required for e.g. sqlite3, fs, tcp/http. how small can it be with just stdout support: console.log("hello world!")?

What alternatives have you considered?

Node.js
Tauri
Neutralinojs
NW.js
Electron

[Jarred-Sumner]

around 50% of the binary size on Linux is libicu which JavaScriptCore needs

[paulocoghi]

Out of curiosity. Do you believe UTF++ could be an alternative to libicu?

In addition to being lightweight, it is about 2x faster than libicu:

The performance of ICU, UTFPP, and libiconv were compared for the conversion of 9000 code points covering most languages with 10,000 iterations for all pairwise conversions between UTF8, UTF16, and UTF32.

Library	Time (seconds)
ICU (C++)	2.120
libiconv	2.795
UTFPP	1.201

[Jarred-Sumner]

If it correctly implements the same interface/symbols for functions used by JavaScriptCore then definitely open to trying alternatives

[paulocoghi]

I apologize, because my research wasn't profound enough and UTF++ probably won't suit Bun's use case.

[Ristovski]

Perhaps Bun could provide a trimmed build using something like Nodes icutrim?

https://github.com/nodejs/node/tree/main/tools/icu:

icu_small.json controls the "small" (English only) ICU. It is input to icutrim.py

[jeltz]

There is also ICU4x which might be worth looking into. It is supposed to be modular so it can be used in resource contained environments.

https://github.com/unicode-org/icu4x

[paulocoghi]

Wow, thanks for the suggestion, @jeltz . I read the announcing article of ICU4X, and it seems a good candidate.

• created and maintained by the same org
• availability and ease of use in multiple programming languages
• small, lightweight and portable (doesn't depend of external libraries)
• uses little RAM and CPU (which could contribute to lower Bun resource usage even more)

[AwakeningLightning]

There is also ICU4x which might be worth looking into. It is supposed to be modular so it can be used in resource contained environments.

https://github.com/unicode-org/icu4x

Seems good, hope it gets implemented.

[7heMech]

I wonder how much smaller it is tho.