# crossfilter/crossfilter

Fast n-dimensional filtering and grouping of records.

Repository: https://github.com/crossfilter/crossfilter
Canonical: https://ross.abutalabs.com/products/crossfilter-crossfilter
Homepage: http://crossfilter.github.io/crossfilter/
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2023-07-19T00:43:22+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4110, "days_push": 1142, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1757, forks 192 (observed 2026-08-28T04:05:32.342883+00:00)

## What it is
Crossfilter is a JavaScript library for fast n-dimensional filtering and grouping of large multivariate datasets, designed for interactive exploration in the browser. It uses sorted indexes and incremental filtering to support sub-30ms interaction with coordinated views even on datasets with a million or more records.

## Use cases
- filter a million-record dataset interactively in the browser
- build coordinated dashboards with linked charts
- compute live histograms and top-K lists over multivariate data
- power dc.js dimensional charting visualizations
- incrementally filter and group records by multiple dimensions

## When to choose
- you need fast client-side multidimensional filtering for coordinated D3/dc.js views
- your dataset fits in browser memory and needs sub-30ms interaction
- you want incremental filtering and grouping without recomputing from scratch

## When to avoid
- you need server-side or out-of-core analytics on datasets too large for the browser
- you need a project with active maintenance - maintainers are being sought
- you need a full charting library rather than a filtering/grouping engine

## Facets
- artifact type: library
- maturity: maintenance
- function: data-science, search-engine, data-visualization
- domain: data-science, data-visualization, analytics, frontend
- platform: browser
- tags: multidimensional-filtering, coordinated-views, d3, client-side-analytics, incremental-filtering, nodejs, javascript

## Member repositories
- crossfilter/crossfilter (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:32.342883+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 2026-08-30T03:27:39.614880+00:00, confidence not recorded.
  - readme: https://github.com/crossfilter/crossfilter (fetched 2026-08-28T04:05:32.342883+00:00, sha 2b0022fcfcf1)
  - homepage: http://crossfilter.github.io/crossfilter/ (fetched 2026-08-29T11:06:09.072451+00:00, sha 76cc2e2dd7dd)
- Data as of 2026-08-30T08:39:29.467469+00:00.