SwapBoost

Another brilliant piece of open source software. One of the semi-more interesting things bout Microsoft Windows Vista is ReadyBoost. ReadyBoost basically precaches things that you might be using on a flash drive that can boost your performance somewhat by allowing more swap space. SwapBoost also does the similar thing by allowing more swap space via a flash medium, but does not do the precaching (you can use the preload daemon for that). So while this is alpha code and is really just a longer bash script, it definitely shows that at least from proof of concept wise, linux can do many of the similar types of features that Windows provides.
Truth be told that you probably will not see much gains in speed from using this alone. The way linux uses its swap space, it already uses the maximum amount it can from memory whereas Windows does not. So if you have a lot of memory and aren’t running many memory intensive applications, there’s a likelihood that your flash based swap isn’t even used.
That said, it can still definitely be useful for those older machines that have peaked on their RAM upgrades and could use a slight boost in swap speeds from a flash medium versus a hard drive.
Lifehacker < UbuntuTutorials