Thumbnail creation taking too long about pyvips HOT 2 OPEN

Hi @anirudhagarwal1,

Wow, that is slow. I tried your file on my PC:

$ time vips copy very-slow.pdf[dpi=300] x.jpg 

real	0m39.694s
user	0m37.869s
sys	0m1.938s

And it's almost as bad.

I tried firefox preview and it's also very slow.

By default, libvips uses poppler for PDF rendering and I think your file probably just uses some feature with a slow implementation in poppler. libvips can also use PDFium as a PDF backend, perhaps that's quicker? I'll try it.

from pyvips.

I recompiled my libvips against PDFium 5947 and I now see:

$ time vips copy very-slow.pdf[dpi=300] x.jpg 

real	0m2.216s
user	0m1.324s
sys	0m1.014s

So I think I'd look into installing pdfium on your macbook.

from pyvips.