lafikl/perfBar

Health v2 · maintenance only

Adoption not part of the score

1091 stars · 33 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

PerfBar is a lightweight JavaScript library for collecting and displaying website performance metrics directly in the browser, with support for budgeting and custom metrics. It bundles dozens of built-in metrics like load time, latency, and first paint via a single dependency-free script.

Use cases

• monitor website performance metrics in the browser
• set performance budgets for page load time and latency
• add custom performance metrics for a specific web app
• quickly check first paint and number of HTTP requests
• track front-end rendering time during development

When to choose

• you want a zero-dependency single-script performance dashboard in the browser
• you need simple performance budgeting with built-in Navigation Timing metrics
• you are auditing page load behavior during development

When to avoid

• you need actively maintained tooling or modern metrics like Core Web Vitals (LCP, CLS)
• you need server-side or CI-based performance monitoring
• you require Firefox support for first paint metrics

Facets

library · maturity abandoned

monitoring analytics benchmarking web-development performance frontend developer-tools browser performance-metrics web-performance budgeting navigation-timing client-side javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="lafikl/perfBar")