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wtf is re-reselect?

methuselah96/re-reselect — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2021-12-11

Audience · developerComplexity · 2/5DormantSetup · easy

TL;DR

A caching layer for Reselect that speeds up React/Redux apps by storing multiple cached selectors keyed by argument, instead of recomputing on every call.

Mindmap

mindmap
  root((repo))
    What it does
      Caches multiple selectors
      Avoids recomputation
      Wraps Reselect
    Tech stack
      JavaScript
      Redux
      Reselect
    Use cases
      Filtered data views
      Multi-parameter selectors
      Performance optimization
    Audience
      Redux developers
      React app builders

Code map

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filefunction / class

Why would anyone build with this?

REASON 1

Cache selector results per argument so filtering or grouping data across components stays fast.

REASON 2

Swap Reselect for re-reselect in an existing Redux app with minimal code changes.

REASON 3

Avoid recomputing expensive data transformations when a selector is called repeatedly with the same arguments.

REASON 4

Limit how many cached selectors are stored to control memory usage in a large app.

What's in the stack?

JavaScriptReduxReselect

How it stacks up

methuselah96/re-reselect0verflowme/alarm-clock0verflowme/seclists
Language—CSS—
Last pushed2021-12-112022-10-032020-05-03
MaintenanceDormantDormantDormant
Setup difficultyeasyeasyeasy
Complexity2/52/51/5
Audiencedevelopervibe coderops devops

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 5min

Yoink these prompts

Prompt 1
Show me how to convert an existing Reselect selector to re-reselect with a custom cache key.
Prompt 2
Explain how re-reselect decides which cached selector to reuse versus recompute.
Prompt 3
Help me set up a re-reselect selector that caches filtered user data separately per category ID.
Prompt 4
Walk me through configuring re-reselect to limit the number of cached selector instances it keeps.

Frequently asked questions

wtf is re-reselect?

A caching layer for Reselect that speeds up React/Redux apps by storing multiple cached selectors keyed by argument, instead of recomputing on every call.

Is re-reselect actively maintained?

Dormant — no commits in 2+ years (last push 2021-12-11).

How hard is re-reselect to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is re-reselect for?

Mainly developer.

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