TheDev-Team has released 0.9.9b7 which brings a new faster option.
After some feedback on reddit, we’ve decided to make the initialas quick as possible by no longer “stashing” the applications by default during the run. This reduces the time to actually perform the jailbreak from 210 seconds to 80 seconds (60 percent!). However, you make up for much of that the first time you launch , which will then want to stash the applications. You can choose whether you want redsn0w or to stash in the Preferences pane.
You can download the new RedSn0w updates from the link given below.