typelevel / typelevel/cats-mtl

Explore a submodule for more performant instances.

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#80 2 comments 0 reactions 0 assignees View on GitHub

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enhancement triage
Dominant language
Scala
Stars
307
Forks
66
Avg merge
6h 23m
Merged PRs (30d)
2

Description

As many have said before, stacking multiple monad transformers can be quite inefficient, it'd be cool if we had some kind of story for supporting performant instances for different combination of mtl classes.
Oleg has already done some work in that regard with meow-mtl and at the start of the year, I've also played around with specialized instances at cats-mtl-special.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the issue's references to meow-mtl and cats-mtl-special to understand the proposed approach to performant instances. The issue does not name files, tests, or a concrete completion criterion, so the desired submodule design and validation would need to be established before implementation.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
tooling
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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