rewrite bundling for smaller bundles

[devsnek]

• Remove redundant async functions in common cases
• Replace validation with smaller call to WebAssembly.validate
• Remove duplicated check for shared memory
• Removes fetch(data uri) to avoid CSP.

Overall, this results in ~6% size savings (621 bytes vs 587 bytes

[surma]

So I like where this is going, thanks for your effort!

Two things:

1. The index.js files contained // Name: and // Proposal: comments that are used to programmatically update the readme. This would need to be moved to the .wat file.
2. This is actually bigger after gzip (621 bytes on master vs 686 bytes on this branch). I think you might be better off not trimming the wasm preamble as gzip will take care of that.

An idea I’ve had (and maybe you wanna take a stab at that): I wondered if hex encoding is better.

• The decoder is literally new Uint8Array(hexstring.split(/(..)/).filter(x => x).map(v => parseInt(v, 16)))
• Same code works in node and web
• It probably compresses just as well as base64 with gzip

WDYT?

[devsnek]

@surma what are you using to test the gzipped size. by my count we are now saving exactly 1 byte, but we also no longer rely on fetch.

[surma]

cat dist/esm/index.js | gzip -c9n | wc -c

[devsnek]

in that case we're now down to 587

[surma]

Brilliant! Thanks a bunch!

I’m on mobile for today, but I’ll give this a proper review tomorrow 🎉

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[surma]

Good thinking on this one :D

[surma]

I removed the global data object as it would make the code not as tree-shakable. We are also down to 560 Bytes :D

If you have on objections, I’ll merge this :)

[surma]

@googlebot I consent.

[googlebot]

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[surma]

... lol

[devsnek]

really nice thinking on the bind(null, hex string)!