The general idea on these forums is that such programs aren't worth the money and the trouble. It's better to spend the money on RAM than on software that's trying to do memory management better than Windows does.

But this one being free and with no reviews claiming this program crashed their system you can try. It might make a difference in certain cases. But it would be diffecult to get a precise and objective idea of it things really get faster.

Tell more on your machine (OS, CPU, amount of RAM) and what you do with it so somebody can say if it sounds reasonable enough.