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AbdullZ7 / pdfium

Automatically exported from code.google.com/p/pdfium
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Chrome Mac PDF scrolling is laggy and slow on large PDFs, and consumes lots of ram. #135

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?.
1. Open a large PDF. E.g. 
http://media.wizards.com/downloads/dnd/dndbasicrules.pdf
2. Scroll at a rate of 1 about page per second.
3. Repeat the same scrolling activity with the PDF open in Preview.

What is the expected output? What do you see instead?
Chrome lags while scrolling and check the Task Manager to note that it's taking 
196 MB of RAM for that tab.
Preview scrolls smoothly, even at faster speed. It does start to lag at about 
~10 pages per second. It uses only about 80 M of RAM, according to Mac Activity 
Monitor.

What version of the product are you using? On what operating system?
I'm running Version 42.0.2311.50 beta (64-bit) on OS X 10.9.5.

Original issue reported on code.google.com by kell...@google.com on 24 Mar 2015 at 12:30