Prepend each line with timestamp to make it easier to see where the

bottlenecks are.

Author: Kami

rake/formatter.rb

@@ -87,9 +87,11 @@ def inject_headers(command, lines, spaces=2)
 
       def command_headers(command)
         ShellOut::HEADERS_LIST.inject('') do |result, k|
+          now = Time.new
           color = command.failure? ? [:red, :bold] : Array(ShellOut::HEADERS_COLORS[k])
           header = send(:"header_#{k}", command) if respond_to?(:"header_#{k}", true)
-          header ? result << '[%s]' % colorize(header, *color) : result
+          hours, minutes, seconds, _ = Date.day_fraction_to_time(now)
+          header ? result << '[%s] %s:%s:%s' % [colorize(header, *color), hours, minutes, seconds] : result
         end
       end