From d825a35e18c6abaf7c45b03cf805461e94a37da6 Mon Sep 17 00:00:00 2001
From: bholmesdev <hey@bholmes.dev>
Date: Tue, 12 Jul 2022 12:33:00 -0400
Subject: [PATCH] Revert "wip: what if we just... didn't have a memory test"

This reverts commit 173729dbdc685e52881fc3333487b8f744add55f.
---
 scripts/memory/index.js                   | 79 +++++++++++++++++++++++
 scripts/memory/mk.js                      | 21 ++++++
 scripts/memory/project/.gitkeep           |  0
 scripts/memory/project/src/pages/.gitkeep |  0
 4 files changed, 100 insertions(+)
 create mode 100644 scripts/memory/index.js
 create mode 100644 scripts/memory/mk.js
 create mode 100644 scripts/memory/project/.gitkeep
 create mode 100644 scripts/memory/project/src/pages/.gitkeep

diff --git a/scripts/memory/index.js b/scripts/memory/index.js
new file mode 100644
index 0000000000..30cc1c0f2a
--- /dev/null
+++ b/scripts/memory/index.js
@@ -0,0 +1,79 @@
+import { fileURLToPath } from 'url';
+import v8 from 'v8';
+import dev from '../../packages/astro/dist/core/dev/index.js';
+import { loadConfig } from '../../packages/astro/dist/core/config.js';
+import prettyBytes from 'pretty-bytes';
+
+if (!global.gc) {
+	console.error('ERROR: Node must be run with --expose-gc');
+	process.exit(1);
+}
+
+const isCI = process.argv.includes('--ci');
+
+/** URL directory containing the entire project. */
+const projDir = new URL('./project/', import.meta.url);
+
+let config = await loadConfig({
+	cwd: fileURLToPath(projDir),
+});
+
+const telemetry = {
+	record() {
+		return Promise.resolve();
+	},
+};
+const server = await dev(config, { logging: { level: 'error' }, telemetry });
+
+// Prime the server so initial memory is created
+await fetch(`http://localhost:3000/page-0`);
+
+async function run() {
+	for (let i = 0; i < 100; i++) {
+		let path = `/page-${i}`;
+		await fetch(`http://localhost:3000${path}`);
+	}
+}
+
+global.gc();
+const startSize = v8.getHeapStatistics().used_heap_size;
+
+// HUMAN mode: Runs forever. Optimized for accurate results on each snapshot Slower than CI.
+if (!isCI) {
+	console.log(
+		`Greetings, human. This test will run forever. Run with the "--ci" flag to finish with a result.`
+	);
+	let i = 1;
+	while (i++) {
+		await run();
+		global.gc();
+		const checkpoint = v8.getHeapStatistics().used_heap_size;
+		console.log(`Snapshot ${String(i).padStart(3, '0')}: ${(checkpoint / startSize) * 100}%`);
+	}
+}
+
+// CI mode: Runs 100 times. Optimized for speed with an accurate final result.
+for (let i = 0; i < 100; i++) {
+	await run();
+	const checkpoint = v8.getHeapStatistics().used_heap_size;
+	console.log(`Estimate ${String(i).padStart(3, '0')}/100: ${(checkpoint / startSize) * 100}%`);
+}
+
+console.log(`Test complete. Running final garbage collection...`);
+global.gc();
+const endSize = v8.getHeapStatistics().used_heap_size;
+
+// If the trailing average is higher than the median, see if it's more than 5% higher
+let percentage = endSize / startSize;
+const TEST_THRESHOLD = 1.5;
+const isPass = percentage < TEST_THRESHOLD;
+console.log(``);
+console.log(`Result: ${isPass ? 'PASS' : 'FAIL'} (${percentage * 100}%)`);
+console.log(
+	`Memory usage began at ${prettyBytes(startSize)} and finished at ${prettyBytes(endSize)}.`
+);
+console.log(`The threshold for a probable memory leak is ${TEST_THRESHOLD * 100}%`);
+console.log(``);
+console.log(`Exiting...`);
+await server.stop();
+process.exit(isPass ? 0 : 1);
diff --git a/scripts/memory/mk.js b/scripts/memory/mk.js
new file mode 100644
index 0000000000..44cbe52778
--- /dev/null
+++ b/scripts/memory/mk.js
@@ -0,0 +1,21 @@
+import fs from 'fs';
+
+const base = new URL('./project/', import.meta.url);
+const pages = new URL('./src/pages/', base);
+
+await fs.promises.writeFile(new URL('./package.json', base), `{
+  "name": "@test/smoke",
+  "version": "0.0.0",
+  "private": true,
+  "dependencies": {
+    "astro": "workspace:*"
+  }
+}`);
+
+for (let i = 0; i < 100; i++) {
+	let content = `---
+const i = ${i};
+---
+<span>{i}</span>`;
+	await fs.promises.writeFile(new URL(`./page-${i}.astro`, pages), content, 'utf-8');
+}
diff --git a/scripts/memory/project/.gitkeep b/scripts/memory/project/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/scripts/memory/project/src/pages/.gitkeep b/scripts/memory/project/src/pages/.gitkeep
new file mode 100644
index 0000000000..e69de29bb2