# davecheney/gcvis

Visualise Go program GC trace data in real time

Repository: https://github.com/davecheney/gcvis
Canonical: https://ross.abutalabs.com/products/gcvis
Homepage: http://dave.cheney.net/2014/07/11/visualising-the-go-garbage-collector
Language: Go
License: BSD-2-Clause
License Family: permissive
Archived: true
Last push: 2019-03-13T01:20:26+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4437, "days_push": 2731, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1094, forks 71 (observed 2026-08-28T04:03:33.938481+00:00)

## What it is
gcvis is a Go CLI tool that visualizes Go program garbage collector trace data (GODEBUG=gctrace output) in real time via a browser graph. It wraps a target command or reads trace data from stdin or a log file.

## Use cases
- visualize go garbage collector pauses in real time
- plot gctrace output as graphs
- analyze gc behavior of a go program without modifying its source
- feed gctrace log file into a visualization
- diagnose memory pressure and gc frequency in go services

## When to choose
- you need a quick visual of Go GC cycles from GODEBUG=gctrace output
- you cannot modify the target program's source to add profiling
- you are on Go 1.6 and want GC timing graphs

## When to avoid
- you need maintained tooling - the project is explicitly unmaintained since 2019
- you are on Go versions newer than 1.6 and need GC timing graphs
- you need full profiling rather than GC trace visualization - use pprof instead

## Facets
- artifact type: cli-tool
- maturity: abandoned
- function: monitoring, data-visualization, developer-tools
- domain: developer-tools, performance, monitoring
- platform: go, cli, cross-platform
- tags: garbage-collector, gctrace, profiling, go-runtime, real-time-visualization

## Member repositories
- davecheney/gcvis (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:33.938481+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 2026-08-30T06:47:36.091385+00:00, confidence not recorded.
  - readme: https://github.com/davecheney/gcvis (fetched 2026-08-28T04:03:33.938481+00:00, sha 6896eb2dd3bd)
  - homepage: http://dave.cheney.net/2014/07/11/visualising-the-go-garbage-collector (fetched 2026-08-29T12:50:27.113609+00:00, sha acd4f8272af0)
  - site_page: https://dave.cheney.net/about (fetched 2026-08-29T12:50:27.123021+00:00, sha bfa0e0327744)
- Data as of 2026-08-30T08:39:29.467469+00:00.