add concurrent example

Concurrence_examples/concurrent_tasks.py

@@ -0,0 +1,49 @@
+import os
+import time
+import threading
+import multiprocessing
+ 
+NUM_WORKERS = 4
+ 
+def run_sleep():
+    print("PID: %s, Process Name: %s, Thread Name: %s" % (
+        os.getpid(),
+        multiprocessing.current_process().name,
+        threading.current_thread().name)
+    )
+    time.sleep(1)
+ 
+ 
+# Run tasks serially
+start_time = time.time()
+
+for _ in range(NUM_WORKERS):
+    run_sleep()
+
+end_time = time.time()
+ 
+print("Serial time=", end_time - start_time)
+ 
+
+# Run tasks using threads
+start_time = time.time()
+
+threads = [threading.Thread(target=run_sleep) for _ in range(NUM_WORKERS)]
+[thread.start() for thread in threads]
+[thread.join() for thread in threads]
+
+end_time = time.time()
+ 
+print("Threads time=", end_time - start_time)
+ 
+
+# Run tasks using processes
+start_time = time.time()
+
+processes = [multiprocessing.Process(target=run_sleep()) for _ in range(NUM_WORKERS)]
+[process.start() for process in processes]
+[process.join() for process in processes]
+
+end_time = time.time()
+ 
+print("Parallel time=", end_time - start_time)