Explain WASM size through Github Action

[maxammann]

Goal of this task is to give some more insights into the size of the wasm/native binary.

Note: This is a beginner task because it requires no insight into maplibre-rs. But its probably not tivial.

🤔 Expected Behavior

• We want a cargo profile, which includes debug symbols, but is else identical to a release build. This gives a good estimate of actual sizes and allows to debug the usage.
• Track wasm size through a custom Github Action. Post diffs in the PR.
  • MVP: Post size differences of binary output between builds
  • Future: Breakdown usage by function/crate/....
  • For linux binaries we can use: https://github.com/RazrFalcon/cargo-bloat
  • For wasm we must use: https://github.com/rustwasm/twiggy

😯 Current Behavior

No insights.

💁 Possible Solution

There is https://github.com/orf/cargo-bloat-action/tree/master/src
Sadly this does not support WASM. Also it sends data to some cloudflare service in the US.

🔦 Context

💻 Examples

[maxammann]

I created a PR which covers the first task of this PR. Create binaries in release mode with debug symbols.

[maxammann]

Twiggy has a bug right now: rustwasm/twiggy#326