Enable zero-allocation conversion between Atom's from different static atom sets
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- Dominant language
- Rust
- Stars
- 212
- Forks
- 84
- Avg merge
- 1d 2h
- Merged PRs (30d)
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Description
It would be useful to be able to cheaply convert between an Atom<StyloAtomSet>, an Atom<ServoAtomSet>, a DefaultAtom, etc. This would allow for interop between different crates without a performance penalty and without them all needing to coordinate on which set of static atoms to use.
However currently a dynamically allocated Atom is keyed by it's hash and that hash varies between static atom sets. So converting between Atom types requires reallocating.
I believe that implementing this would involve changing the Hash implementation of Atom to hash the content of the Atom rather than 64 bit value (see also https://github.com/servo/string-cache/issues/224 for why this may be a good anyway). At which point
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First steps
- Read the whole issue, then the project's contributing guide.
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Research direction
Start by reviewing the Atom Hash implementation and the rationale in string-cache issue #224. Determine how hashing Atom content would affect conversions among Atom, Atom, and DefaultAtom. Done means these conversions avoid reallocation while preserving correct interning and hashing behavior.
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Assessment
- Tech stack
- rust
- Domain
- performance
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Quiet
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100