When it comes to cache and temp files if you have enough memory put them on a RAM Disk, no loss of speed and if you want to save it on shutdown you can.
There have been one or two lengthy discussions here on the pros and cons of RAMdisks. Do you see significant benefits, pilgrim?
As I commented elsewhere I never benchmark anything so my answer/opinion is entirely subjective.
Compared to my newest PC both my XP computers are slow, the Netbook has an N270 (OC'd to 1.74Ghz), the PC a 3.066Ghz P4, both are limited to 2GB of RAM which in turn limits the size of RAMDisk I can use.
One of the first things I moved was the Firefox cache and in my opinion that definitely improved things on both computers, for other things I would say that there was an improvement but by how much is debatable.
On my newest PC I have 16GB of RAM, most of the time my normal usage rarely exceeds half that so a 4GB RAMDrive is not a problem, I do not have a Page File.
Because of the overall specifications of the machine and the fact that the system drive is an SSD any advantages in terms of performance are probably minimal.
Having said that, it keeps the cache and temp files off of the SSD and it is faster than it would be if I had moved them to a hard drive.
Also, as I said in my previous post I use it for other things.
The bottom line: As long as I had the resources in terms of available RAM I would always use a RAMDisk.
Would I recommend them to others? Subject to the same criteria yes, there is something to gain and as far as I can see nothing to lose.
I am only aware of one thing that some might consider a negative and that is if you save a RAMDisk image that has a lot of files on it, it will increase your start-up times, by how much depends on the files involved and the system itself.
That's one of the reasons my image contains just a few empty folders, if I am about to shut down and want to save anything else I simply copy it to a hard drive.
Open at your own risk!
I was surprised at the reservations expressed about SSD's in this thread.
I know that to start with there were problems with some of them.
But unless I am mistaken I'm sure I read something recently that said SSD's can be cured?