# rakyll/coop

Cheat sheet for some of the common concurrent flows in Go

Repository: https://github.com/rakyll/coop
Canonical: https://ross.abutalabs.com/products/rakyll-coop
Language: Go
License Family: other
Archived: true
Last push: 2015-10-06T15:47:03+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4612, "days_push": 3984, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1193, forks 44 (observed 2026-08-28T04:03:56.512485+00:00)

## What it is
A Go package containing implementations of common concurrent program flows such as timed execution, repetition, timeouts, and throttled parallel execution. The author explicitly recommends treating it as a snippets reference or cheat sheet rather than a production library, and the package is now obsolete.

## Use cases
- run a Go function after a delay or at a specific time
- repeat a function on an interval until a deadline
- cancel a function if it exceeds a timeout
- run multiple functions concurrently and wait for all to finish
- limit the number of concurrent goroutines with throttling
- learn common Go concurrency patterns by example

## When to choose
- learning Go concurrency idioms through small readable examples
- copying snippet patterns for timers, timeouts, and fan-out into your own code

## When to avoid
- production use, since the author declares the package obsolete
- needing performant or well-maintained concurrency utilities
- projects requiring a maintained license and active support

## Facets
- artifact type: library
- maturity: abandoned
- function: concurrency, scheduling, developer-tools
- domain: developer-tools, programming-languages
- platform: go, cross-platform
- tags: go-concurrency, cheat-sheet, goroutines, snippets, obsolete, algorithms

## Member repositories
- rakyll/coop (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:56.512485+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:22:22.235138+00:00, confidence not recorded.
  - readme: https://github.com/rakyll/coop (fetched 2026-08-28T04:03:56.512485+00:00, sha 72915f32fe5b)
- Data as of 2026-08-30T08:39:29.467469+00:00.