perf(document): skip parallel validate check when creating new docume…

…nt in insertMany()

Re: #14719

benchmarks/insertManySimple.js

@@ -0,0 +1,38 @@
+'use strict';
+
+const mongoose = require('../');
+
+run().catch(err => {
+  console.error(err);
+  process.exit(-1);
+});
+
+async function run() {
+  await mongoose.connect('mongodb://127.0.0.1:27017/mongoose_benchmark');
+  const FooSchema = new mongoose.Schema({ foo: String });
+  const FooModel = mongoose.model('Foo', FooSchema);
+
+  if (!process.env.MONGOOSE_BENCHMARK_SKIP_SETUP) {
+    await FooModel.deleteMany({});
+  }
+
+  const numDocs = 1500;
+  const docs = [];
+  for (let i = 0; i < numDocs; ++i) {
+    docs.push({ foo: 'test foo ' + i });
+  }
+
+  const numIterations = 200;
+  const insertStart = Date.now();
+  for (let i = 0; i < numIterations; ++i) {
+    await FooModel.insertMany(docs);
+  }
+  const insertEnd = Date.now();
+
+  const results = {
+    'Average insertMany time ms': +((insertEnd - insertStart) / numIterations).toFixed(2)
+  };
+
+  console.log(JSON.stringify(results, null, '  '));
+  process.exit(0);
+}

lib/document.js

@@ -2601,17 +2601,6 @@ Document.prototype.validate = async function validate(pathsToValidate, options)
   let parallelValidate;
   this.$op = 'validate';
 
-  if (this.$isSubdocument != null) {
-    // Skip parallel validate check for subdocuments
-  } else if (this.$__.validating) {
-    parallelValidate = new ParallelValidateError(this, {
-      parentStack: options && options.parentStack,
-      conflictStack: this.$__.validating.stack
-    });
-  } else {
-    this.$__.validating = new ParallelValidateError(this, { parentStack: options && options.parentStack });
-  }
-
   if (arguments.length === 1) {
     if (typeof arguments[0] === 'object' && !Array.isArray(arguments[0])) {
       options = arguments[0];
@@ -2622,6 +2611,18 @@ Document.prototype.validate = async function validate(pathsToValidate, options)
     const isOnePathOnly = options.pathsToSkip.indexOf(' ') === -1;
     options.pathsToSkip = isOnePathOnly ? [options.pathsToSkip] : options.pathsToSkip.split(' ');
   }
+  const _skipParallelValidateCheck = options && options._skipParallelValidateCheck;
+
+  if (this.$isSubdocument != null) {
+    // Skip parallel validate check for subdocuments
+  } else if (this.$__.validating && !_skipParallelValidateCheck) {
+    parallelValidate = new ParallelValidateError(this, {
+      parentStack: options && options.parentStack,
+      conflictStack: this.$__.validating.stack
+    });
+  } else if (!_skipParallelValidateCheck) {
+    this.$__.validating = new ParallelValidateError(this, { parentStack: options && options.parentStack });
+  }
 
   if (parallelValidate != null) {
     throw parallelValidate;

lib/model.js

@@ -3199,12 +3199,14 @@ Model.$__insertMany = function(arr, options, callback) {
         // execute the callback synchronously
         return immediate(() => callback(null, doc));
       }
+      let createdNewDoc = false;
       if (!(doc instanceof _this)) {
         if (doc != null && typeof doc !== 'object') {
           return callback(new ObjectParameterError(doc, 'arr.' + index, 'insertMany'));
         }
         try {
           doc = new _this(doc);
+          createdNewDoc = true;
         } catch (err) {
           return callback(err);
         }
@@ -3220,7 +3222,7 @@ Model.$__insertMany = function(arr, options, callback) {
         // execute the callback synchronously
         return immediate(() => callback(null, doc));
       }
-      doc.$validate().then(
+      doc.$validate(createdNewDoc ? { _skipParallelValidateCheck: true } : null).then(
         () => { callback(null, doc); },
         error => {
           if (ordered === false) {