benchmarks: add nestedArrayLarge benchmark to reproduce #9588 scenario

Author: Kundan-CR7

benchmarks/nestedArrayLarge.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const mongoose = require('../');
+const Benchmark = require('benchmark');
+
+const { Schema } = mongoose;
+
+run().catch(err => {
+  console.error(err);
+  process.exit(1);
+});
+
+async function run() {
+    await mongoose.connect('mongodb://127.0.0.1:27017/mongoose_benchmark');
+
+    const bookSchema = new Schema({
+        ticker: String,
+        asks: [[Number]],
+        bids: [[Number]],
+        timestamp: String,
+    });
+
+    const Book = mongoose.model('BookNestedArray', bookSchema);
+
+    let doc = { asks: [], bids: [] };
+    for (let i = 0; i < 10000; ++i) {
+        doc.asks.push([i]);
+        doc.bids.push([i]);
+    }
+
+    const suite = new Benchmark.Suite();
+
+    suite
+        .add('BookNestedArray document construction', function () {
+        new Book(doc);
+        })
+        .on('cycle', function(evt) {
+        if (process.env.MONGOOSE_DEV || process.env.PULL_REQUEST) {
+            console.log(String(evt.target));
+        }
+        })
+        .run();
+
+    await mongoose.disconnect();
+}