perf(readability): add document-write benchmark

packages/metascraper-readability/benchmark/document-write.js

@@ -0,0 +1,62 @@
+'use strict'
+
+const { Window } = require('happy-dom')
+const { readFileSync } = require('fs')
+
+const url = 'https://arxiv.org/pdf/2412.06592'
+const html = readFileSync('./fixture.html', 'utf8')
+
+const isEqual = (value1, value2) =>
+  JSON.stringify(value1) === JSON.stringify(value2)
+
+const cases = {
+  'document.documentElement.innerHTML': () => {
+    const window = new Window({ url })
+    const document = window.document
+    document.documentElement.innerHTML = html
+    return document
+  },
+  'document.write': async () => {
+    const window = new Window({ url })
+    const document = window.document
+    document.write(html)
+    await window.happyDOM.waitUntilComplete()
+    return document
+  }
+}
+
+const measure = async fn => {
+  const now = Date.now()
+  const result = await fn()
+  return { result, duration: Date.now() - now }
+}
+
+const iterations = 10
+
+;(async () => {
+  const results = await Promise.all(
+    Object.entries(cases).map(async ([name, fn]) => {
+      let totalDuration = 0
+      let result
+      for (let i = 0; i < iterations; i++) {
+        const { result: output, duration } = await measure(fn)
+        totalDuration += duration
+        if (i === iterations - 1) result = output
+      }
+      const averageDuration = totalDuration / iterations
+      return { name, duration: averageDuration, result }
+    })
+  )
+
+  const [firstResult, ...otherResults] = results.map(({ result }) => result)
+
+  for (const result of otherResults) {
+    if (!isEqual(firstResult, result)) {
+      throw new Error('Results are different')
+    }
+  }
+
+  results.forEach(({ name, duration }) => {
+    console.log(`${name}: ${duration}ms`)
+  })
+})()