Benchmark opening files of various sizes

ogirardot · Oct 14, 2016 · 17c72d5 · 17c72d5
1 parent 5db4c8d
commit 17c72d5
Showing 1 changed file with 56 additions and 14 deletions.
diff --git a/benchmarks/text-editor-large-file-construction.bench.js b/benchmarks/text-editor-large-file-construction.bench.js
@@ -1,19 +1,61 @@
 /** @babel */
 
-import fs from 'fs'
-import temp from 'temp'
 import {TextEditor, TextBuffer} from 'atom'
 
-export default function ({test}) {
-  const text = 'Lorem ipsum dolor sit amet\n'.repeat(test ? 10 : 500000)
-  const t0 = window.performance.now()
-  const buffer = new TextBuffer(text)
-  const editor = new TextEditor({buffer, largeFileMode: true})
-  editor.element.style.height = "600px"
-  document.body.appendChild(editor.element)
-  const t1 = window.performance.now()
-  editor.element.remove()
-  editor.destroy()
-
-  return [{name: 'Opening and rendering a large file', duration: t1 - t0}]
+const MAX_SIZE_IN_KB = 10 * 1024
+const SIZE_STEP_IN_KB = 1024
+const LINE_TEXT = 'Lorem ipsum dolor sit amet\n'
+const CLICK_COUNT = 2
+const TEXT = LINE_TEXT.repeat(Math.ceil(MAX_SIZE_IN_KB * 1024 / LINE_TEXT.length))
+
+export default async function ({test}) {
+  const data = []
+
+  for (let sizeInKB = 0; sizeInKB < MAX_SIZE_IN_KB; sizeInKB += SIZE_STEP_IN_KB) {
+    const text = TEXT.slice(0, sizeInKB * 1024)
+    console.log(text.length / 1024)
+
+    const t0 = window.performance.now()
+    const buffer = new TextBuffer(text)
+    const editor = new TextEditor({buffer, largeFileMode: true})
+    editor.element.style.height = "600px"
+    document.body.appendChild(editor.element)
+    const t1 = window.performance.now()
+
+    data.push({
+      name: 'Opening and rendering a large file',
+      x: sizeInKB,
+      duration: t1 - t0
+    })
+
+    for (let i = 0; i < CLICK_COUNT; i++) {
+      const t2 = window.performance.now()
+      editor.setCursorScreenPosition(
+        editor.element.screenPositionForPixelPosition({
+          top: i * 20,
+          left: 0
+        })
+      )
+      const t3 = window.performance.now()
+
+      data.push({
+        name: 'Clicking somewhere onscreen after opening a large file',
+        x: sizeInKB,
+        duration: t3 - t2
+      })
+
+      await timeout(100)
+    }
+
+    editor.element.remove()
+    editor.destroy()
+    buffer.destroy()
+    await timeout(5000)
+  }
+
+  return data
+}
+
+function timeout (duration) {
+  return new Promise((resolve) => setTimeout(resolve, duration))
 }