[10000truths]

> Does anyone know what the source of this delay is? Is it network-bound or is Chrome just really slow to render large PDFs? Do PDFs have to be fully downloaded to begin rendering? In any case, this delay is my only gripe with arxiv and a progressively rendered HTML doc that instantly loads the document text would be a huge improvement.

The default PDF format puts the xref table at the end of the file, forcing a full download before rendering can take place. PDF-1.2 onwards supports linearized PDFs, and most PDF export tools have some way of enabling it (usually an option like "optimize for web").