Just to inform how I solved the issue: The problem was not with the Acer Aspire One being slow, but there were unbearable delays every now and then. The PC stopped responding for a span from 30 seconds to 3 minutes. Also, while benchmarking the SDD (using the HD Tune), the results varied from 34 MB/s to notches of 0.1 MB/s, without any apparent pattern.
I browsed many forums about this issue, as I suspected the SSD or the controller to be failing, only to realize that this is a common problem. Some people reported significant improvement when using
FlashPoint driver, as
4wd pointed out (thanks again!).
So I installed the latest
beta and now I have a completely different machine! The benchmarks shows now a comb-like pattern varying from 34.3 MB/s to 30.8 MB/s. There are no delays at all! Of course, the machine has not a blazing speed like "big" notebooks with real hard disks, but that had to be expected.
At the moment there's only one small drawback—the current version of FlashPoint doesn't support hibernation.
Besides, I didn't notice any change in speed when using NTFS instead of supplied FAT32.
I don't know how the FlashPoint works, but it works really perfect. Kudos to the developers!