Data commit

Task/Time-a-function/D/time-a-function-1.d

@@ -0,0 +1,24 @@
+import std.stdio, std.datetime;
+
+int identity(int x) {
+    return x;
+}
+
+int sum(int num) {
+    foreach (i; 0 .. 100_000_000)
+        num += i;
+    return num;
+}
+
+double timeIt(int function(int) func, int arg) {
+    StopWatch sw;
+    sw.start();
+    func(arg);
+    sw.stop();
+    return sw.peek().usecs / 1_000_000.0;
+}
+
+void main() {
+    writefln("identity(4) takes %f6 seconds.", timeIt(&identity, 4));
+    writefln("sum(4) takes %f seconds.", timeIt(&sum, 4));
+}

Task/Time-a-function/D/time-a-function-2.d

@@ -0,0 +1,27 @@
+import tango.io.Stdout;
+import tango.time.Clock;
+
+int identity (int x)
+{
+    return x;
+}
+
+int sum (int num)
+{
+    for (int i = 0; i < 1000000; i++)
+      num += i;
+    return num;
+}
+
+double timeIt(int function(int) func, int arg)
+{
+    long before = Clock.now.ticks;
+    func(arg);
+    return (Clock.now.ticks - before) / cast(double)TimeSpan.TicksPerSecond;
+}
+
+void main ()
+{
+    Stdout.format("Identity(4) takes {:f6} seconds",timeIt(&identity,4)).newline;
+    Stdout.format("Sum(4) takes {:f6} seconds",timeIt(&sum,4)).newline;
+}