diff -r 1347bbd86c52 -r 780c40aaad27 progs/mandelbrot.scala
--- a/progs/mandelbrot.scala	Thu Dec 07 12:09:06 2017 +0000
+++ b/progs/mandelbrot.scala	Sat Dec 16 23:53:28 2017 +0000
@@ -75,8 +75,8 @@
   val delta_x = (end.a - start.a) / W
   val delta_y = (end.b - start.b) / H
    
-  for (y0 <- (0 until H)) {
-    for (x0 <- (0 until W)) {
+  for (y0 <- (0 until H).par) {
+    for (x0 <- (0 until W).par) {
     
      val c = start + Complex(x0 * delta_x, y0 * delta_y)
 
@@ -113,21 +113,21 @@
 val exb1 = Complex(-0.37465401, 0.659227668)
 val exb2 = Complex(-0.37332410, 0.66020767)
 
-time_needed(mandelbrot(exb1, exb2, 1000))
+//time_needed(mandelbrot(exb1, exb2, 1000))
 
 // example 3
 val exc1 = Complex(0.435396403, 0.367981352)
 val exc2 = Complex(0.451687191, 0.380210061)
 
-time_needed(mandelbrot(exc1, exc2, 1000))
+//time_needed(mandelbrot(exc1, exc2, 1000))
 
 // some more computations with example 3
 val delta = (exc2 - exc1) * 0.0333
 
-time_needed(
-  for (i <- (0 to 12)) 
-     mandelbrot(exc1 + delta * i, 
-                exc2 - delta * i, 1000))
+//time_needed(
+//  for (i <- (0 to 12)) 
+//     mandelbrot(exc1 + delta * i, 
+//                exc2 - delta * i, 1000))