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Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you?

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On 2018-09-17, Arlen Holder <arlenholder@nospam.net> wrote:
> I just ran these six tests moments ago on Ubuntu 18.04 on an old desktop.
>
> Do the widely disparate times make any sense to you?
> (I took lots of screenshots - but they take too long to edit & post.)
>
> 1. On Windows, I copied a photo 400 times, named ant001.jpg to ant400.jpg
>    Each photo = 4,287,961 bytes   Entire directory = 1.7 GB
> --- at this point I dual booted to Ubuntu ---
> 2. I slid those 400 files over USB from that Windows filesystem to Android
>    Time = 18 minutes, 21 seconds
> 7. I slid those 400 files over USB from that Windows filesystem to iOS
>    Time = 1 minute, 42 seconds
> 3. I slid those 400 files over USB from Android to the Windows filesystem
>    Time = 2 minutes, 20 seconds
> 6. I slid those 400 files over USB from iOS to the Windows filesystem
>    Time = 1 minute, 55 seconds
> 5. I slid those 400 files over USB from iOS to Android
>    Time = 11 minutes, 49 seconds
> 4. I slid those 400 files over USB from Android to iOS
>    Time = 3 minutes, 5 seconds

They don't seem completely crazy. it could be that the android has a slower flash
writing speed or that the iOS did some short-cut specially because the 400
files had identical content but 18:21 vs 11:49 is puzzling.

Using distinct files and copying to/from a linux ramdisk might be informative.

-- 
     ت

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Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Arlen Holder <arlenholder@nospam.net> - 2018-09-17 03:59 +0000
  Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Jasen Betts <jasen@xnet.co.nz> - 2018-09-17 07:01 +0000
    Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Arlen Holder <arlenholder@nospam.net> - 2018-09-18 03:25 +0000
  Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Dan Purgert <dan@djph.net> - 2018-09-17 10:47 +0000
    Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Arlen Holder <arlenholder@nospam.net> - 2018-09-18 03:27 +0000
      Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Dan Purgert <dan@djph.net> - 2018-09-18 10:00 +0000
        Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Arlen Holder <arlenholder@nospam.net> - 2018-09-19 04:22 +0000
  Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Paul <nospam@needed.invalid> - 2018-09-17 09:53 -0400
    Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Arlen Holder <arlenholder@nospam.net> - 2018-09-18 03:37 +0000
      Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Paul <nospam@needed.invalid> - 2018-09-18 00:33 -0400
        Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-20 02:00 +0000
          Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Paul <nospam@needed.invalid> - 2018-09-20 05:55 -0400
            Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-20 19:52 +0000
              Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? "Arlen H. Holder" <arlenholder@nospam.net> - 2018-09-20 19:58 +0000
        Re: Do these USB transfer times on Ubuntu 18.04 to mobile devices make sense to you? Mike Easter <MikeE@ster.invalid> - 2018-09-20 11:31 -0700

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