Re: [fluid-dev] parallel loading of soundfont samples

[Hamish Moffatt]

On 28/10/20 2:53 am, Ceresa Jean-Jacques wrote:
> Hi,
>
> >I did look through the sfloader code and I can see it's not easy to 
> restructure it to use multiple threads.
>
> >Still, I think parallel loading of the soundfonts would be a good
> optimization that would benefit every application using Fluidsynth.
>
> Before doing any attempt to restructure it to use multiple threads, 
> may I suggest you doing a simple test to check where is the bottleneck ?.
>
> - 1) doesn't the bottleneck is in SF3 time decoding ?.
>
> - 2) doesn't the bottleneck is in disk file reading ?.

I have two soundfonts, FluidR3_Mono.sf2 (99Mb) / sf3 (13Mb), and 
piano.sf2 (238Mb) / sf3 (22Mb).

The SF3 files are taking ~5 seconds each to load. The SF2 files take 
400-500ms, despite being 7-10x the size, so the bottleneck is not disk I/O.


Unfortunately my debugger/profile (Visual Studio) isn't seeing symbols 
inside my fluidsynth.dll in order for me to profile it right now.


Hamish