Kotlin / Kotlin/dataframe

[Performance] Add optimized ValueColumn implementation when all column values are same

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performance
Dominant language
Kotlin
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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Description

In such case column implementation can store just a single value instead of List.

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 the ValueColumn implementation and its usages. Determine how columns whose values are all identical are represented, then verify that using a single stored value preserves existing column behavior and performance expectations.

Written by the indexing model from the issue text.

Assessment

Tech stack
kotlin
Domain
data, performance
Issue type
Refactor
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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