--- mouse-wrapscreen.c	2015-09-17 16:57:57.563217953 +0200
+++ mouse-wrapscreen.c	2015-09-17 16:58:08.797179507 +0200
@@ -66,6 +66,7 @@
 #define PRINT_PREFIX PROG_NAME ": "
 #define VERSION "0.5"
 #define DEFAULT_RESISTANCE 15
+#define DEFAULT_SLEEP 1000
 
 static inline int
 getOtherScreen (int screen)
@@ -81,6 +82,7 @@
   {"left", no_argument, NULL, 'l'},
   {"right", no_argument, NULL, 'i'},
   {"both", no_argument, NULL, 'b'},
+  {"sleep", required_argument, NULL, 's'},
   {NULL, 0, NULL, 0}
 };
 
@@ -92,6 +94,8 @@
           "    -r, --resistance=R  Mouse pointer has an edge resistance of R when cross-,\n"
           "                        ing from one screen to the other (%d is the default,\n"
           "                        1 will make the mouse pass over right away)\n"
+          "    -s, --sleep=S       Sleep that many microseconds between position checks.\n"
+          "                        The default value is %d.\n"
           "    -v, --verbose       Print some information about what is being done\n"
           "                        Can be specified twice for even more outputd\n"
           "    -h, --help          Print this help text and exit\n"
@@ -101,7 +105,7 @@
           "    -l, --left          Screen 1 is left of screen 0\n"
           "    -i, --right         Screen 1 is rigt of screen 0\n"
           "    -b, --both          Pass cursor on both the left and the right edge\n"
-          "                        (default)\n", argv[0], DEFAULT_RESISTANCE);
+          "                        (default)\n", argv[0], DEFAULT_RESISTANCE, DEFAULT_SLEEP);
 }
 
 int
@@ -117,8 +121,9 @@
   int verbose = 0;
   int left = 1;
   int right = 1;
+  int sleep_us = DEFAULT_SLEEP;
 
-  while ((c = getopt_long (argc, argv, "r:hvVlib", long_options, NULL)) != -1) {
+  while ((c = getopt_long (argc, argv, "r:s:hvVlib", long_options, NULL)) != -1) {
     switch (c) {
     case 'h':
       usage (argv);
@@ -136,6 +141,14 @@
         return 1;
       }
       break;
+    case 's':
+      sleep_us = atoi (optarg);
+      if (sleep_us < 1) {
+        fprintf (stderr, PRINT_PREFIX "Sleep value must be greater or equal to one\n");
+        usage (argv);
+        return 1;
+      }
+      break;
     case 'v':
       verbose++;
       break;
@@ -278,8 +291,8 @@
         modif = 0;
       }
 
-      //sleeps for 1ms                 
-      usleep (1000);
+      // sleeps for 1ms (default) or as specified on the command line:
+      usleep (sleep_us);
 
       // reset gets triggered when we see an unrelated event
       if (reset)