Slides Publishing

[sergey-tihon]

The goal of this PR is to improve speed of slide publishing.

Base Line

PPTX file with 51 slide and 14.2 MB using code

var doc = new PmlDocument(srcDoc);
for (var i = 0; i < 51; i++)
{
    var source = new SlideSource(doc, i, 1, true);
    var slide = PresentationBuilder.BuildPresentation(new List<SlideSource> { source });
    slide.SaveAs(srcDoc.Replace(".pptx", $"_{i+1:000}.pptx"));
}

takes about

and create 51 file with total size 39.4 MB In the same time PowerPoint 2013 create 51 file with total size 16.0 MB

Size grow looks very aggressive - 177% vs 12.6% Time also kind of slow, because it Open source document for each slide extraction - 51 time.

[sergey-tihon]

Current results

vs slightly less memory pressure

[sergey-tihon]

Current result us about 6x perf improvement for 54decks with 652 MB in total

After processing all 54 decks, I've extracted 2641 slides with total size 679 MB. (about 4% size grow)