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`wac_types::Package` not having its own `wac_types::Types` requires re-parsing packages on every composition

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#85 7 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
rust, wasm
Domain
tooling

Research direction

Start with wac_types::Package::from_bytes, wac_types::Types, and wac_graph::CompositionGraph to understand how package types are registered and remapped. Compare repeated compositions using cached utility packages with reparsing, and consider the proposed register_package_with_types entry point; done means reusable packages can participate in multiple compositions without reparsing.

Written by the indexing model from the issue text.

Description

In my usecase, I need to perform several compositions that each have a different "main" component but several util components that are the same (they implement WASI, similar to what wasi-virt does but even more constrained). Previously, I was only parsing these util packages once (using Package::from_bytes, storing them in a std::sync::OnceLock, and then using them in many compositions.

I just updated my code to the latest version of wac on git. Now that the wac_types::Types are inside the wac_graph::CompositionGraph, I can no longer cache (or at least I don't know how to) the util packages but need to re-parse them on every composition.

Perhaps there could be an extra utility function, e.g. wac_graph::CompositionGraph::register_package_with_types, to take in another wac_types::Types instance and to add all of these types to the composition graph's types and to remap the package's types into the composition graph's ones (I assume something like that was done before)?

Thank you for your help and all of your amazing work on these crates!

Dominant language
Rust
Stars
208
Forks
41
Avg merge
2d 7h
Merged PRs (30d)
3

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