typelevel / typelevel/fs2

Optimize `Stream#evalTapChunk`

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Dominant language
Scala
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Merged PRs (30d)
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Description

Current implementation piggy-backs on evalMapChunk, which causes extra allocations.

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 locating Stream#evalTapChunk and its current use of evalMapChunk. Compare the two entry points to identify where the extra allocations occur, then verify that the optimized implementation preserves evalTapChunk behavior while reducing allocations.

Written by the indexing model from the issue text.

Assessment

Tech stack
scala
Domain
stream-processing
Issue type
Refactor
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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