diff --git a/19-configuration-management/.env b/19-configuration-management/.env
new file mode 100644
index 0000000..78a4768
--- /dev/null
+++ b/19-configuration-management/.env
@@ -0,0 +1,2 @@
+DATABASE_HOST=localhost
+DATABASE_PORT=5432
diff --git a/19-configuration-management/README.md b/19-configuration-management/README.md
new file mode 100644
index 0000000..e69de29
diff --git a/19-configuration-management/config.ini b/19-configuration-management/config.ini
new file mode 100644
index 0000000..1b70efb
--- /dev/null
+++ b/19-configuration-management/config.ini
@@ -0,0 +1,3 @@
+[Database]
+host = 127.0.0.1
+port = 3306
diff --git a/19-configuration-management/configparser_example.py b/19-configuration-management/configparser_example.py
new file mode 100644
index 0000000..38aa507
--- /dev/null
+++ b/19-configuration-management/configparser_example.py
@@ -0,0 +1,21 @@
+import configparser
+
+# create a ConfigParser object
+config = configparser.ConfigParser()
+
+# read configuration from a file
+config.read('config.ini')
+
+# access a value
+database_host = config.get('Database', 'host')
+database_port = config.getint('Database', 'port')
+
+print(f"Database Host: {database_host}")
+print(f"Database Port: {database_port}")
+
+# write to a configuration file
+config['Database']['host'] = 'localhost'
+config['Database']['port'] = '5432'
+
+with open('config.ini', 'w') as configfile:
+    config.write(configfile)
diff --git a/19-configuration-management/dotenv_example.py b/19-configuration-management/dotenv_example.py
new file mode 100644
index 0000000..0296a90
--- /dev/null
+++ b/19-configuration-management/dotenv_example.py
@@ -0,0 +1,12 @@
+from dotenv import load_dotenv
+import os
+
+# load environment variables from .env file
+load_dotenv()
+
+# access environment variables
+database_host = os.getenv('DATABASE_HOST')
+database_port = os.getenv('DATABASE_PORT')
+
+print(f"Database Host: {database_host}")
+print(f"Database Port: {database_port}")
diff --git a/20-memory-performance/README.md b/20-memory-performance/README.md
new file mode 100644
index 0000000..cbf5b38
--- /dev/null
+++ b/20-memory-performance/README.md
@@ -0,0 +1,41 @@
+
+## Overview
+
+This repo includes scripts for profiling memory usage and performance in Python.
+
+## What is Memory Profiling?
+
+Memory profiling is the process of analyzing a program to understand its memory consumption patterns. This involves tracking how much memory your application uses and identifying memory-intensive parts of your code.
+
+### Why Use Memory Profiling?
+
+1. **Optimize Memory Usage**: Memory profiling helps identify memory leaks and inefficient memory usage, which can lead to improved performance and reduced memory consumption.
+2. **Enhance Performance**: By understanding which parts of your code are using the most memory, you can refactor or optimize those areas to make your application more efficient.
+3. **Resource Management**: For applications running on systems with limited resources, efficient memory usage is critical to maintaining stability and performance.
+
+
+## What is Performance Profiling?
+
+Performance profiling is the process of analyzing a program to determine its execution time and identify bottlenecks. This involves measuring how long different parts of your code take to execute.
+
+### Why Use Performance Profiling?
+
+1. **Identify Bottlenecks**: Performance profiling helps pinpoint parts of your code that are slow or inefficient, allowing you to focus optimization efforts where they are needed most.
+2. **Improve Efficiency**: By understanding execution times, you can make informed decisions about code improvements to enhance overall performance.
+3. **Benchmarking**: Profiling provides benchmarks that help you measure the impact of optimizations and compare different approaches.
+
+
+### Files
+
+- `memory_profiler_example.py`: Demonstrates how to use the `memory_profiler` library to track memory usage of a Python function.
+- `performance_profiling.py`: Uses the `cProfile` module to profile the execution time of a Python function.
+
+
+### Setup
+
+To use these profiling scripts, make sure you have the necessary libraries installed:
+
+```bash
+pip install memory_profiler
+```
+
diff --git a/20-memory-performance/memory_profiler_example.py b/20-memory-performance/memory_profiler_example.py
new file mode 100644
index 0000000..b056f00
--- /dev/null
+++ b/20-memory-performance/memory_profiler_example.py
@@ -0,0 +1,14 @@
+from memory_profiler import profile
+import time
+
+@profile
+def compute_sum(n):
+    total = 0
+    for i in range(n):
+        total += i
+        time.sleep(0.01)  # some delay
+    return total
+
+if __name__ == "__main__":
+    result = compute_sum(1000)
+    print(f"Sum is {result}")
diff --git a/20-memory-performance/performance_profiling.py b/20-memory-performance/performance_profiling.py
new file mode 100644
index 0000000..4a28e6f
--- /dev/null
+++ b/20-memory-performance/performance_profiling.py
@@ -0,0 +1,27 @@
+import cProfile
+import pstats
+import io
+
+def compute_sum(n):
+    total = 0
+    for i in range(n):
+        total += i
+    return total
+
+def main():
+    result = compute_sum(100000)
+    print(f"Sum is {result}")
+
+if __name__ == "__main__":
+    pr = cProfile.Profile()
+    pr.enable()
+    
+    main()
+    
+    pr.disable()
+    s = io.StringIO()
+    sortby = 'cumulative'
+    ps = pstats.Stats(pr, stream=s).sort_stats(sortby)
+    ps.print_stats()
+    
+    print(s.getvalue())