4 ms·

> Does a userspace filesystem loose a lot of performance... Yes. Try the two versions out, and see for yourself if you are curious.

• dekhn 7y ago
  I use a FUSE filesystem on linux- not ExFAT, but as an S3 interface. I often see 1+Gigabyte/sec throughput over the wire from simple multithreaded IO operations. FUSE can be very fast.
  • notriddle 7y ago
    For one thing, that's throughput, not latency. For another, that's probably a desktop, not a smartphone.
    • dekhn 7y ago
      That's correct, my metric for performance is throughput I don't really think a desktop vs a smartphone matters much at this comparison, it's just my observation that when people say a fuse filesystem is slow it's just not well-engineered, not that the fuse API is inherently slow
      • grosswait 7y ago
        Run a benchmark that measures more than throughput and you'll see the difference. IOPs are usually poor.
        • codycraven 7y ago
          Latency is a nightmare if you perform certain types of tasks on FUSE.
      • Piskvorrr 7y ago
        It matters a lot. You can squeeze impressive performance from a smartphone, too, but then you need to dump all that waste heat somewhere, plus you need to take battery capacity into account. In other words, in a desktop, power efficiency is commendable, but not critical.