Re: Memory + Disk cache issues
Posted: Sun Feb 03, 2019 9:54 pm
Hi all & Tracker team,
I just wanted to quickly report that PDF-XChange Editor can be cranked up to use use dozens of gigabytes of RAM without any problems.
Below is a screenshot from Task Manager showing PDF-XChange Editor using almost 22 GB of RAM (on a 32 GB system):
This is a thousand pages PDF file displayed on a 4K screen, after all pages, all thumbnails and all text have been loaded into RAM.
It's incredible how fast you can scroll, navigate and search the PDF in this state where everything is cached in RAM!
Particularly scrolling through a PDF file shown in full-page view on a retina hidpi screen with like 20 fps (or, pages per second :) is an amazing experience.
It makes me very happy every day that the feature to keep everything in RAM as long as possible (i.e. until the file is closed) has been implemented about a year ago!
Of course it would still be better (and the respective feature is highly anticipated) if a few pages in both directions would be pre-rendered, as discussed above.
Keep up the great work
Best regards
David
Edit:
Whoaa, a while later memory usage is down to under 6GB of RAM while there is no perceivable speed drop when navigating the PDF!
How is this possible? Is this Windows swapping out stuff from RAM to the hard drive -- but without much speed loss?
(in my case it's a SSD)
I just wanted to quickly report that PDF-XChange Editor can be cranked up to use use dozens of gigabytes of RAM without any problems.
Below is a screenshot from Task Manager showing PDF-XChange Editor using almost 22 GB of RAM (on a 32 GB system):
This is a thousand pages PDF file displayed on a 4K screen, after all pages, all thumbnails and all text have been loaded into RAM.
It's incredible how fast you can scroll, navigate and search the PDF in this state where everything is cached in RAM!
Particularly scrolling through a PDF file shown in full-page view on a retina hidpi screen with like 20 fps (or, pages per second :) is an amazing experience.
It makes me very happy every day that the feature to keep everything in RAM as long as possible (i.e. until the file is closed) has been implemented about a year ago!
Of course it would still be better (and the respective feature is highly anticipated) if a few pages in both directions would be pre-rendered, as discussed above.
Keep up the great work
Best regards
David
Edit:
Whoaa, a while later memory usage is down to under 6GB of RAM while there is no perceivable speed drop when navigating the PDF!
How is this possible? Is this Windows swapping out stuff from RAM to the hard drive -- but without much speed loss?
(in my case it's a SSD)