prevent all monitors making requests at the same moment when start the server

src/util.ts

@@ -81,3 +81,25 @@ export class TimeLogger {
         }
     }
 }
+
+/**
+ * Returns a random number between min (inclusive) and max (exclusive)
+ */
+export function getRandomArbitrary(min, max) {
+    return Math.random() * (max - min) + min;
+}
+
+/**
+ * From: https://stackoverflow.com/questions/1527803/generating-random-whole-numbers-in-javascript-in-a-specific-range
+ *
+ * Returns a random integer between min (inclusive) and max (inclusive).
+ * The value is no lower than min (or the next integer greater than min
+ * if min isn't an integer) and no greater than max (or the next integer
+ * lower than max if max isn't an integer).
+ * Using Math.round() will give you a non-uniform distribution!
+ */
+export function getRandomInt(min, max) {
+    min = Math.ceil(min);
+    max = Math.floor(max);
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+}