lib/rufus/scheduler/cronline.rb in rufus-scheduler-3.0.3 vs lib/rufus/scheduler/cronline.rb in rufus-scheduler-3.0.4

@@ -1,7 +1,7 @@
 #--
-# Copyright (c) 2006-2013, John Mettraux, [e-mail]
+# Copyright (c) 2006-2014, John Mettraux, [e-mail]
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
 # in the Software without restriction, including without limitation the rights
 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
@@ -195,10 +195,32 @@
         @monthdays,
         @timezone ? @timezone.name : nil
       ]
     end
 
+    # Returns a quickly computed approximation of the frequency for this
+    # cron line.
+    #
+    # #brute_frequency, on the other hand, will compute the frequency by
+    # examining a whole, that can take more than seconds for a seconds
+    # level cron...
+    #
+    def frequency
+
+      return brute_frequency unless @seconds && @seconds.length > 1
+
+      delta = 60
+      prev = @seconds[0]
+
+      @seconds[1..-1].each do |sec|
+        d = sec - prev
+        delta = d if d < delta
+      end
+
+      delta
+    end
+
     # Returns the shortest delta between two potential occurences of the
     # schedule described by this cronline.
     #
     # .
     #
@@ -219,10 +241,10 @@
     # One obvious improvement would be to cache the result once computed...
     #
     # See https://github.com/jmettraux/rufus-scheduler/issues/89
     # for a discussion about this method.
     #
-    def frequency
+    def brute_frequency
 
       delta = 366 * DAY_S
 
       t0 = previous_time(Time.local(2000, 1, 1))