diff --git a/lesson-demo/pom.xml b/lesson-demo/pom.xml
index 80b50add..cc65bf59 100644
--- a/lesson-demo/pom.xml
+++ b/lesson-demo/pom.xml
@@ -10,5 +10,18 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>lesson-demo</artifactId>
-
+    
+    <dependencies>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.7.3</version>
+        </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-hikaricp</artifactId>
+            <version>5.4.10.Final</version>
+        </dependency>
+    </dependencies>
+    
 </project>
\ No newline at end of file
diff --git a/lesson-demo/src/main/java/com/bobocode/DemoApp.java b/lesson-demo/src/main/java/com/bobocode/DemoApp.java
index 21d5205b..c2015c00 100644
--- a/lesson-demo/src/main/java/com/bobocode/DemoApp.java
+++ b/lesson-demo/src/main/java/com/bobocode/DemoApp.java
@@ -1,7 +1,34 @@
 package com.bobocode;
 
+import com.zaxxer.hikari.HikariDataSource;
+import lombok.SneakyThrows;
+import org.postgresql.ds.PGSimpleDataSource;
+
+import javax.sql.DataSource;
+
 public class DemoApp {
+    @SneakyThrows
     public static void main(String[] args) {
-        
+        DataSource dataSource = initDb();
+        var start = System.nanoTime();
+
+        for (int i = 0; i < 20; i++) {
+            try (var connection = dataSource.getConnection()) {
+                try (var selectStatement = connection.createStatement()) {
+                    selectStatement.executeQuery("select random()"); // just to call the DB
+                }
+            }
+        }
+
+        var end = System.nanoTime();
+        System.out.println((end - start) / 1000_000 + "ms");
+    }
+
+    private static DataSource initDb() { // todo: refactor to use a custom pooled data source
+        var dataSource = new PGSimpleDataSource();
+        dataSource.setURL("jdbc:postgresql://0.tcp.eu.ngrok.io:11708/postgres");
+        dataSource.setUser("bobouser");
+        dataSource.setPassword("bobopass");
+        return dataSource;
     }
 }