(Performance) Remove an unnecessary syscall

Author: da2x

lib/rake/file_task.rb

@@ -14,7 +14,11 @@ class FileTask < Task
     # Is this file task needed?  Yes if it doesn't exist, or if its time stamp
     # is out of date.
     def needed?
-      !File.exist?(name) || out_of_date?(timestamp) || @application.options.build_all
+      begin
+        out_of_date?(File.mtime(name)) || @application.options.build_all
+      rescue Errno::ENOENT
+        true
+      end
     end
 
     # Time stamp for file task.