I don't think is such a good idea!
My Advice
increase the size of your InnoDB buffer pool is the best way to speed up MySQL. If you can add more RAM, do it. This will put most of your hot data in memory so imagine ! Disk vs Memory!
my opinion

I don't think is such a good idea!
My Advice
increase the size of your InnoDB buffer pool is the best way to speed up MySQL. If you can add more RAM, do it. This will put most of your hot data in memory so imagine ! Disk vs Memory!
Perfect scenario is to have your memeory the size of your database
SSD - is great but it will come expensive ! and it's only good for read intensive jobs .

Check this link for nice article on this from Vadim Tkachenko