CASOON Open Source
See where your Astro build spends its time.
astro-speed-measure wraps the hooks of your integrations and Vite plugins, adds up the time per page, asset and content collection, and prints a report when the build is done. The report next to this text comes from building this site.
npm install @casoon/astro-speed-measurepnpm add @casoon/astro-speed-measureMITnpm 0.4.0Astro 5 · 6 · 7Node ≥ 22.12
╔══════════════════════════════════════════════════════════════╗ ║ ASTRO SPEED MEASURE - Build Performance Report ║ ╠══════════════════════════════════════════════════════════════╣ ║ Total Build Time: 776ms ║ ╚══════════════════════════════════════════════════════════════╝ INTEGRATIONS ──────────────────────────────────────────────────────────────── @casoon/pages-theme <1ms ░░░░░░░░░░░░░░░░░░░░ 0% VITE PLUGINS ──────────────────────────────────────────────────────────────── astro:session-provider 74ms ██░░░░░░░░░░░░░░░░░░ 10% astro:routes 44ms █░░░░░░░░░░░░░░░░░░░ 6% vite:import-analysis 25ms █░░░░░░░░░░░░░░░░░░░ 3% vite:css-post 22ms █░░░░░░░░░░░░░░░░░░░ 3% astro:assets 14ms ░░░░░░░░░░░░░░░░░░░░ 2% astro:server-islands 8ms ░░░░░░░░░░░░░░░░░░░░ 1% builtin:vite-json 4ms ░░░░░░░░░░░░░░░░░░░░ 0% casoon-pages-virtual 2ms ░░░░░░░░░░░░░░░░░░░░ 0% astro:scripts:page-ssr 2ms ░░░░░░░░░░░░░░░░░░░░ 0% builtin:oxc-runtime 2ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:asset 2ms ░░░░░░░░░░░░░░░░░░░░ 0% astro:head-metadata 2ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:build-import-analysis 1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:oxc <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:terser <1ms ░░░░░░░░░░░░░░░░░░░░ 0% alias <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:client-inject <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:pre-alias <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:optimized-deps <1ms ░░░░░░░░░░░░░░░░░░░░ 0%
- to build this site, measured on 2026-09-13
- 0.78 s
- Vite plugins timed in that build
- 19
- Vite hooks wrapped per plugin
- 4
- runtime dependency (picocolors)
- 1
What it does
Integration hooks
Every hook of every integration in your config is wrapped in place and timed, including closures that hooks share, as <code>@astrojs/mdx</code> needs.
Vite plugins
<code>resolveId</code>, <code>load</code>, <code>transform</code> and <code>renderChunk</code> are timed for each plugin. The module ids of those calls feed the page, asset and content views.
Pages, assets, content
The module timings are grouped into the slowest pages, the slowest scripts, styles, fonts and images, and the time spent on each content collection.
Baselines, budgets, CI
The JSON report is kept for a comparison with the next build. Budgets warn when a limit is exceeded, and GitHub Actions gets a step summary.
The full report
All examples →╔══════════════════════════════════════════════════════════════╗ ║ ASTRO SPEED MEASURE - Build Performance Report ║ ╠══════════════════════════════════════════════════════════════╣ ║ Total Build Time: 776ms ║ ╚══════════════════════════════════════════════════════════════╝ INTEGRATIONS ──────────────────────────────────────────────────────────────── @casoon/pages-theme <1ms ░░░░░░░░░░░░░░░░░░░░ 0% VITE PLUGINS ──────────────────────────────────────────────────────────────── astro:session-provider 74ms ██░░░░░░░░░░░░░░░░░░ 10% astro:routes 44ms █░░░░░░░░░░░░░░░░░░░ 6% vite:import-analysis 25ms █░░░░░░░░░░░░░░░░░░░ 3% vite:css-post 22ms █░░░░░░░░░░░░░░░░░░░ 3% astro:assets 14ms ░░░░░░░░░░░░░░░░░░░░ 2% astro:server-islands 8ms ░░░░░░░░░░░░░░░░░░░░ 1% builtin:vite-json 4ms ░░░░░░░░░░░░░░░░░░░░ 0% casoon-pages-virtual 2ms ░░░░░░░░░░░░░░░░░░░░ 0% astro:scripts:page-ssr 2ms ░░░░░░░░░░░░░░░░░░░░ 0% builtin:oxc-runtime 2ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:asset 2ms ░░░░░░░░░░░░░░░░░░░░ 0% astro:head-metadata 2ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:build-import-analysis 1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:oxc <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:terser <1ms ░░░░░░░░░░░░░░░░░░░░ 0% alias <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:client-inject <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:pre-alias <1ms ░░░░░░░░░░░░░░░░░░░░ 0% vite:optimized-deps <1ms ░░░░░░░░░░░░░░░░░░░░ 0% PAGES (slowest first) ──────────────────────────────────────────────────────────────── /changelog ssg <1ms node_modules/.pnpm/@casoon+pages-theme@file+vendor+pages-theme_@astrojs+markdown-satteri@0.4.1_astro@7.3.2_c0319b61b9df79e09748d5dd99f309c2/node_modules/@casoon/pages-theme/routes/changelog.astro /404 ssg <1ms node_modules/.pnpm/@casoon+pages-theme@file+vendor+pages-theme_@astrojs+markdown-satteri@0.4.1_astro@7.3.2_c0319b61b9df79e09748d5dd99f309c2/node_modules/@casoon/pages-theme/routes/404.astro /showcase/[slug] ssg <1ms node_modules/.pnpm/@casoon+pages-theme@file+vendor+pages-theme_@astrojs+markdown-satteri@0.4.1_astro@7.3.2_c0319b61b9df79e09748d5dd99f309c2/node_modules/@casoon/pages-theme/routes/showcase/[slug].astro /showcase ssg <1ms node_modules/.pnpm/@casoon+pages-theme@file+vendor+pages-theme_@astrojs+markdown-satteri@0.4.1_astro@7.3.2_c0319b61b9df79e09748d5dd99f309c2/node_modules/@casoon/pages-theme/routes/showcase/index.astro /docs/[...slug] ssg <1ms node_modules/.pnpm/@casoon+pages-theme@file+vendor+pages-theme_@astrojs+markdown-satteri@0.4.1_astro@7.3.2_c0319b61b9df79e09748d5dd99f309c2/node_modules/@casoon/pages-theme/routes/docs/[...slug].astro / ssg <1ms src/pages/index.astro /_server-islands/[name] ssr <1ms _server-islands.astro /_image api <1ms node_modules/.pnpm/astro@7.3.2_@emnapi+core@1.11.1_@emnapi+runtime@1.11.3_@types+node@24.13.4_yaml@2.9.1/node_modules/astro/dist/assets/endpoint/dev.js ASSETS (slowest first) ──────────────────────────────────────────────────────────────── script 44ms ../session/provider.js script 4ms chunks/Base_DGYMDj_D.mjs script 1ms ../core/util.js script 1ms chunks/cpp_DsdAkftO.mjs script 1ms src/content.config.ts script 1ms chunks/components_DdjCqaWu.mjs script <1ms chunks/ansi_BV25blRJ.mjs script <1ms utils.js script <1ms javascript.mjs script <1ms chunks/jsx-runtime_CqFJ9I2x.mjs CONTENT COLLECTIONS ──────────────────────────────────────────────────────────────── runtime.js 3ms (27 entries) loaders 2ms (71 entries) utils.js <1ms (11 entries) data-store.js <1ms (27 entries) config.js <1ms (27 entries) runtime-assets.js <1ms (11 entries) consts.js <1ms (36 entries) data-store-source.js <1ms (27 entries) runtime <1ms (13 entries)
Complete console report of one build of this site, captured with pnpm capture on 2026-09-13 (Darwin 27.0.0 (arm64), Node v24.11.1, Astro 7.3.2). The showcase adds the JSON report and the full build log; every CI build of this site prints a fresh report in its Actions log.
examples/build-report.ansiQuickstart
Three steps from install to the first report. The documentation explains how to read each section.
- Install
@casoon/astro-speed-measurenext to Astro 5, 6 or 7. - Add
speedMeasure()tointegrations, ideally as the first entry. - Run
astro buildand read the report at the end of the log.
// astro.config.mjs
import { defineConfig } from 'astro/config';
import speedMeasure from '@casoon/astro-speed-measure';
export default defineConfig({
integrations: [speedMeasure()],
});