MobileRead Forums - View Single Post - How to speed up KOReader on opening EPubs?

iandol · 03-14-2022, 02:15 PM

Thanks for the hint. I tried comparing a 7.4MB EPub ("polished" using Calibre to be EPub3 compliant) copied directly vs. exported via a kepub using kobo utilities.

First start:

EPub: 47.5 secs
Kepub: 58.8 secs

I navigated to the same page in both (both quite sluggish, navigation within the epub can be slow). Then within the same session exiting to the file manager and returning to the book is quicker (both are around 8-10 seconds). Plato with the same files:

EPub: 2.4 secs
Kepub: 2.8 secs

Interestingly now if I go to the same page, then exit and reenter each book, Plato slows down to ~7 secs, but things like navigation also tend to be faster.

Making any layout changes also takes ages in KOReader. I am using a custom font, although it has been "readified" using the python script.

03-14-2022, 02:15 PM	#3
iandol Enthusiast Posts: 40 Karma: 216612 Join Date: Feb 2022 Device: Kobo Nia	Thanks for the hint. I tried comparing a 7.4MB EPub ("polished" using Calibre to be EPub3 compliant) copied directly vs. exported via a kepub using kobo utilities. First start: EPub: 47.5 secs Kepub: 58.8 secs I navigated to the same page in both (both quite sluggish, navigation within the epub can be slow). Then within the same session exiting to the file manager and returning to the book is quicker (both are around 8-10 seconds). Plato with the same files: EPub: 2.4 secs Kepub: 2.8 secs Interestingly now if I go to the same page, then exit and reenter each book, Plato slows down to ~7 secs, but things like navigation also tend to be faster. Making any layout changes also takes ages in KOReader. I am using a custom font, although it has been "readified" using the python script.