Investigate iOS framework file size

[nirinchev]

While looking at an unrelated issue with @kneth, we noticed the file size of the iOS binary is surprisingly large. Here's a table of comparison of file sizes between js and .NET:

binary	js	.NET
ios-arm64_armv7	111 MB	60.5 MB
iosarm64_i386_x86_64simulator	98.1 MB	45 MB
androidarm64v8a	8.8 MB	8.3 MB
androidarmeabiv7a	6 MB	5.7 MB
androidarmeabiv7a	9.6 MB	9 MB

What's noticeable is that while the android binaries are fairly similar in size, the iOS ones are almost twice as large as the .NET binaries. It likely points to an incorrect build configuration for iOS.

[kneth]

It is related to #3652 and maybe #3637

[kraenhansen]

These are updated numbers for the prebuilds produced in #6650:

binary	js
ios-arm64	19 MB
ios-arm64_i386_x86_64-simulator	42 MB
ios-arm64_x86_64-maccatalyst	42 MB

I'm unsure how to reproduce the android measurement as I can't seem produce a release binary with the debug symbols stripped.

[nirinchev]

Are those numbers in release or debug builds? Because they still seem a bit large. For comparison, here's what we have on .NET:

binary	.NET
ios-arm64	7.4 MB
ios-arm64_x86_64-simulator	15.5 MB
ios-arm64_x86_64-maccatalyst	16 MB