Can we render pages as soon as loaded from the PDF?

[quamosa]

Which product are you using?

PDF.js Express Viewer

PDF.js Express Version

UI - 8.2.0
Core - 8.2.1

Detailed description of issue
When I view the following linearized PDF https://s3.amazonaws.com/pdftron/downloads/pl/2gb-sample-file.pdf using PDF.js Express Viewer either in my own code or in the online demo PDF.js Viewer Demo | PDF.js Express, it takes about 10-20 seconds before the first page is visible even with partial range loading ocurring.

Expected behaviour
{Provide a screenshot or description of the expected behaviour}
I expect the viewer to begin showing pages as they are loaded. The following URL will show the expected behavior. The first page of this linearized document is visible within 1-2 seconds.

viewer.html

Does your issue happen with every document, or just one?
This also occurs with a 228 page document (61mb) that I have been testing with.

Link to document

2gb-sample-file.pdf

nutrition-optimized.pdf

Code snippet
No code snippet for the demo.

[system]

Hello, I’m Ron, an automated tech support bot

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:

• Best practices for PDF.js Express - Linearize PDF files
• Core engine for WebViewer - Creating your own UI using WebViewer Core
• Events for PDF.js Express - Document and annotation rendering - DocumentViewer.pageComplete

APIs:

• Core.Document - isLinearized()
• Utils - setCanvasMultiplier(value)
• CoreControls.DocumentViewer - refreshAll()

Forums:

• How can we create our custom thumbnail panel beside our viewer?
• Page transition issues in PDF.js viewer
• I cannot use PDF.JS Express to open a PDF file by url in a Vue Project, please help me figure out how is that happen

[Logan]

Hey there,

Document loading is handled by the PDF.js library, which we do not support. However I will create an internal ticket to see if there’s anything we can do to speed this up.

Thanks,
Logan