diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 00000000..d430b8ac
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+14.15.0
\ No newline at end of file
diff --git a/example-application/data-access/order-repository.js b/example-application/data-access/order-repository.js
index 94e515b6..c7b1daac 100644
--- a/example-application/data-access/order-repository.js
+++ b/example-application/data-access/order-repository.js
@@ -28,7 +28,6 @@ module.exports = class OrderReposiroty {
   }
 
   async addOrder(orderDetails) {
-    
     return await orderModel.create(orderDetails);
   }
 };
diff --git a/example-application/test/docker-compose.yml b/example-application/test/docker-compose.yml
index a0b6e939..aed4d877 100644
--- a/example-application/test/docker-compose.yml
+++ b/example-application/test/docker-compose.yml
@@ -1,4 +1,4 @@
-version: "3"
+version: "3.6"
 services:
   db:
     image: postgres:11
@@ -10,10 +10,4 @@ services:
     container_name: "postgres-for-testing"
     ports:
       - "54320:5432"
-    volumes:
-      - data:/var/lib/postgresql/data
-volumes:
-  data:
-    driver_opts:
-      type: tmpfs
-      device: tmpfs
+    tmpfs: /var/lib/postgresql/data
\ No newline at end of file
diff --git a/various-receipes/performance/readme.md b/various-receipes/performance/readme.md
new file mode 100644
index 00000000..5fc22832
--- /dev/null
+++ b/various-receipes/performance/readme.md
@@ -0,0 +1,15 @@
+# Tests Performance
+
+## In-Memory DB
+TL;DR: don't bother
+
+A common time-consuming operation on a typical server is database query, and slow tests are bad.
+Database queries are expensive, also because the data resides on the drive, which is very slowly relative to other parts of the computer.
+One method to speed up the database for testing and local-development is to run the database on RAM, which is way faster than the drive.
+
+But is it worth it? Probably not, and this is why:
+1. SSD is pretty much a standard now, and they are blazingly fast compared to the old HHD.
+2. It's preferred and easier to configure your database for non-durable settings to reduce database-related I/O drastically.
+3. Usually, test scenarios don't involve much data, so the DB's I/O-speed becomes secondary.
+4. The performance between in-memory and regular database with the correct settings is neglectable (if any). 
+Detailed benchmarks and results can be found [here](https://github.com/testjavascript/integration-tests-a-z/issues/9#issuecomment-710674437).
\ No newline at end of file
diff --git a/various-receipes/performance/test/orders-data-for-paramterized-test.json b/various-receipes/performance/test/orders-data-for-paramterized-test.json
new file mode 100644
index 00000000..5edf0864
--- /dev/null
+++ b/various-receipes/performance/test/orders-data-for-paramterized-test.json
@@ -0,0 +1,702 @@
+[
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ],
+  [
+    {
+      "userId": 1,
+      "productId": 2,
+      "mode": "draft"
+    }
+  ]
+]
\ No newline at end of file
diff --git a/various-receipes/performance/test/performance.test.js b/various-receipes/performance/test/performance.test.js
new file mode 100644
index 00000000..1b67513d
--- /dev/null
+++ b/various-receipes/performance/test/performance.test.js
@@ -0,0 +1,54 @@
+const request = require("supertest");
+const sinon = require("sinon");
+const nock = require("nock");
+const {
+    initializeWebServer,
+    stopWebServer
+} = require('../../../example-application/api-under-test');
+const ordersData = require('./orders-data-for-paramterized-test.json');
+
+let expressApp;
+let sinonSandbox;
+
+beforeAll(async (done) => {
+    nock("http://localhost/user/").get(`/1`).reply(200, {
+        id: 1,
+        name: "John",
+    }).persist();
+
+    // ️️️✅ Best Practice: Place the backend under test within the same process
+    expressApp = await initializeWebServer();
+
+    // ️️️✅ Best Practice: use a sandbox for test doubles for proper clean-up between tests
+    sinonSandbox = sinon.createSandbox();
+
+    done();
+});
+
+afterAll(async (done) => {
+    // ️️️✅ Best Practice: Clean-up resources after each run
+    await stopWebServer();
+    done();
+});
+
+beforeEach(() => {
+    if (sinonSandbox) {
+        sinonSandbox.restore();
+    }
+});
+
+// ️️️✅ Best Practice: Structure tests 
+describe("/api", () => {
+    describe("POST /orders", () => {
+        test.each(ordersData)("When adding a new valid order, Then should get back 200 response", async (orderToAdd) => {
+            //Act
+            const receivedAPIResponse = await request(expressApp).post("/order").send(orderToAdd);
+            //Assert
+            const {
+                status,
+            } = receivedAPIResponse;
+
+            expect(status).toBe(200);
+        });
+    });
+});