minor perf. improvements

lib/utils.js

@@ -46,11 +46,12 @@ function curry(f) {
     return function() { return f.apply(this, args.concat(slice(arguments))); };
 };
 
-function prog1(ret) {
+function prog1(ret, f1, f2, f3) {
     if (ret instanceof Function)
         ret = ret();
-    for (var i = 1, n = arguments.length; --n > 0; ++i)
-        arguments[i]();
+    if (f1) f1();
+    if (f2) f2();
+    if (f3) f3();
     return ret;
 };
 
@@ -169,3 +170,9 @@ function string_template(text, props) {
         return props[p];
     });
 };
+
+function time_it(name, cont) {
+    var t1 = new Date().getTime();
+    try { return cont(); }
+    finally { sys.debug("// " + name + ": " + ((new Date().getTime() - t1) / 1000).toFixed(3) + " sec."); }
+};