Re: [Audacity-quality] Imports slower on my Windows PC than on my Big Sur Mac

On Tue, 13 Apr 2021 at 13:22, Peter Sampson <[email protected]>
wrote:

> I'm totally baffled by the fact that Imports slower on my Windows PC than
> on my Big Sur Mac
> in some cases (WAV in particular) significantly so.
>
> This is a spin-off observation from the testing I did today for Bug #2745.
> For that I made a Macro that does
> a) 3 imports of a one-hour MP3 audio file
> b) 3 imports of a one-hour WAV audio file
> c) 3 imports of a one-hour AAC audio file
> Copy of Win Macro attached
>
> On W10 (seconds)
> MP3:   18.6   16.5    16.1
> WAV:   44.5   21.7    25.1
> AAC:   26.7   12.9    18.2
>
> On Mac (seconds)
> MP3:   11.8   12.0    12.0
> WAV:    4.8    5.0      5.2
> AAC:    8.7    8.7      8.8
>
> 1) So we see WAV at an average 30 seconds on W10 versus 5 seconds on Mac
> 2) We see AAC at an average 14 seconds on W10 versus 8.7 seconds on Mac
> 3) We see MP3 at an average 17 seconds on W10 versus 12 seconds on Mac
>
> So:
> a)  the Mac is consistently faster on the imports
> b) but also note that while the Mac is pretty consistent,
>     in contrast on Win the first export of a file-type seems to always be
> the longest
>
> Both these machines are pretty similar in Spec:
> Both are 2-7GZ 8GB RAM dual-core
> Both have 256GB SSD ( Win has 60GB free, Mac has 90GB free)
> Both are Intel processors - Win is i7 Mac is i5
>
> The only difference is that the Windows PC is my primary workhorse so gets
> more work
> Does this make the SSD more fragmented and thus slower?
>

Are you running 32-bit Audacity on 64-bit Windows?
Perhaps there are inefficiencies in writing to the SQLite database due to
the app being 32-bit on 64-bit hardware (?) If that's the case, then I'd
expect a 64-bit build of Audacity to be closer to the performance that you
see on macOS.

Steve


>
>
> Fortunately most of our users will not notice this as most of then work on
> just the one
> platform so will not see X-platform timing differences.  Plus our timings
> for 3.0.2, 3.0.0
> and 2.4.3 are pretty consistently within good tolerance.
>
>
> If anybody can cast any light on the mystery I'd be most grateful.
>
> Thanks,
> Peter.
> _______________________________________________
> Audacity-quality mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/audacity-quality
>

_______________________________________________
audacity-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/audacity-devel