65 lines
2.3 KiB
JavaScript
65 lines
2.3 KiB
JavaScript
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// The size budget: what does the framework itself cost on the wire?
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// Bundles @choojs/core + @choojs/html (browser condition) minified via
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// the same Vite/Rolldown pipeline apps use, then reports min+gzip and
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// min+brotli. CI fails if min+gzip exceeds the budget.
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//
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// npm run size
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import { build } from 'vite'
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import { readFile, readdir, rm, mkdtemp } from 'node:fs/promises'
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import { join } from 'node:path'
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import { tmpdir } from 'node:os'
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import { gzipSync, brotliCompressSync, constants } from 'node:zlib'
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// The promise the README makes; raise only with a paper trail.
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// Context: v7's "4kb" was choo alone — nanohtml lived in the browserify
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// transform. This number is the whole framework: core, html engine,
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// morph, hydrate, router, bus. Currently ~7.97 kB gzip; the headroom is
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// margin, not license.
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const BUDGET_GZIP = 8.5 * 1024
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const VIRTUAL = '\0size:entry'
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const outDir = await mkdtemp(join(tmpdir(), 'choo-size-'))
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await build({
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appType: 'custom',
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logLevel: 'error',
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plugins: [{
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name: 'size-entry',
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resolveId: (id) => id === 'size:entry' ? VIRTUAL : undefined,
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load: (id) => id === VIRTUAL
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? "import choo, { Choo, lazy } from '@choojs/core'\n" +
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"import html from '@choojs/html'\n" +
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"import raw from '@choojs/html/raw'\n" +
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'window.__keep = { choo, Choo, lazy, html, raw }\n'
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: undefined
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}],
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build: {
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outDir,
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emptyOutDir: true,
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rollupOptions: { input: { framework: 'size:entry' } }
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}
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})
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const assets = await readdir(join(outDir, 'assets'))
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const file = assets.find((name) => name.endsWith('.js'))
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const code = await readFile(join(outDir, 'assets', file))
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await rm(outDir, { recursive: true, force: true })
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const gz = gzipSync(code, { level: constants.Z_BEST_COMPRESSION }).length
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const br = brotliCompressSync(code, {
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params: { [constants.BROTLI_PARAM_QUALITY]: constants.BROTLI_MAX_QUALITY }
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}).length
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const kb = (n) => (n / 1024).toFixed(2) + ' kB'
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console.log(`@choojs/core + @choojs/html (browser, minified)`)
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console.log(` raw: ${kb(code.length)}`)
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console.log(` gzip: ${kb(gz)} (budget ${kb(BUDGET_GZIP)})`)
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console.log(` brotli: ${kb(br)}`)
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if (gz > BUDGET_GZIP) {
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console.error(`\nsize budget exceeded: ${kb(gz)} > ${kb(BUDGET_GZIP)} min+gzip`)
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process.exit(1)
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}
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console.log('\nwithin budget ✔')
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