Added warning message for machines with too few cores;

@@ -140,6 +140,15 @@ def main():
 
     # Core count
     ncpus = cpu_count()
+    if ncpus < 4:
+        sys.stderr.write("""
+WARNING: This system does not have enough CPUs to utilize the benefits
+         of a parallelized directory walk. The system's built-in tools
+         would likely be as fast or faster for this process if it will
+         even run at all. Some systems have been found to hang.
+""")
+        time.sleep(15)
+        sys.stderr.write('Process starting...')
 
     # Keep track of our running processes
     procs = []

@@ -197,6 +197,16 @@ def main():
         # Don't recurse
         break
 
+    if ncpus < 4:
+        sys.stderr.write("""
+WARNING: This system does not have enough CPUs to utilize the benefits
+         of a parallelized directory walk. The system's built-in tools
+         would likely be as fast or faster for this process if it will
+         even run at all. Some systems have been found to hang.
+""")
+        time.sleep(10)
+        sys.stderr.write('Process starting...')
+
     # Distribute CPUs
     n_writers = 1
     n_statters = (ncpus - n_writers) / 2