Could performance of wiring be improved?
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
- Issue type
- Refactor
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- scala
- Domain
- performance
Research direction
Start by profiling the wire macro during compilation of a representative Scala build, using the compilation-time traces and Flight Recorder investigation described in the issue. Identify concrete sources of the reported compilation cost and establish a reproducible measurement; done means a verified reduction in wiring-related compilation time without changing dependency-injection behavior.
Written by the indexing model from the issue text.
Description
I'm adding compilation time tracing to scalac to show how long each file/class/method takes to typecheck. The trace drills down further to measure time spent in implicit searches and in macro expansions.
I generated traces for a relatively large Scala build: https://github.com/guardian/frontend. This project uses MacWire for DI within a Play application.
The generated report suggests that 4% of total compilation time is spent in the wire macro:
I'm having trouble getting a good look at this through Flight Recorder to make concrete suggestions about what could be optimized, but I thought I'd lodge this ticket as-is in the meantime.
- Dominant language
- Scala
- Stars
- 1.3k
- Forks
- 77
- Avg merge
- 9m
- Merged PRs (30d)
- 4
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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