update from Atlas with major reorg

attic/concurrency/parallel/llize.py

@@ -0,0 +1,19 @@
+import os
+from parallelize import parallelize
+from time import sleep, time
+
+print('one process:')
+t0 = time()
+for i in range(12):
+    print('%2d pid = %d' % (i, os.getpid()))
+    sleep(.2)
+print('elapsed time: %0.2f' % (time() - t0))
+
+print()
+
+print('several processes:')
+t0 = time()
+for i in parallelize(range(12)):
+    print('%2d pid = %d' % (i, os.getpid()))
+    sleep(.2)
+print('elapsed time: %0.2f' % (time() - t0))