# romkatv/zsh-bench

Benchmark for interactive Zsh

Repository: https://github.com/romkatv/zsh-bench
Canonical: https://ross.abutalabs.com/products/zsh-bench
Language: Shell
License: MIT
License Family: permissive
Topics: zsh, performance
Last push: 2026-04-27T09:38:33+00:00

## Health v2 (maintenance only)
Score: 68/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 79, release rhythm 35, longevity 100
- inputs: {"age_days": 1791, "days_push": 128, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1028, forks 38 (observed 2026-08-28T04:03:17.458240+00:00)

## What it is
zsh-bench is a benchmarking tool that measures user-visible latency of interactive zsh, such as input lag and command lag. It also includes human-bench for studying human perception of latency and provides normalized results to judge what feels fast.

## Use cases
- measure input lag of my interactive zsh setup
- benchmark zsh startup and command latency
- compare zsh plugin managers by performance
- test whether prompt latency is perceptible to humans
- optimize my zsh config for responsiveness
- evaluate powerlevel10k performance

## When to choose
- you want objective, reproducible measurements of interactive zsh latency
- you are tuning or comparing zsh configs, plugins, or plugin managers
- you want latency thresholds grounded in human perception studies

## When to avoid
- you need to benchmark non-interactive shell script execution speed
- you use a shell other than zsh
- you cannot run zsh >= 5.8 as your login shell

## Facets
- artifact type: cli-tool
- maturity: active
- function: benchmarking, developer-tools, cli
- domain: developer-tools, performance
- platform: cli
- tags: zsh, shell-performance, latency-measurement, interactive-shell, command-line, linux, macos

## Member repositories
- romkatv/zsh-bench (main) score 68

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:17.458240+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 2026-08-30T07:07:49.137451+00:00, confidence not recorded.
  - readme: https://github.com/romkatv/zsh-bench (fetched 2026-08-28T04:03:17.458240+00:00, sha b94d791010e0)
- Data as of 2026-08-30T08:39:29.467469+00:00.