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geekmaster · 05-24-2016, 07:53 PM

Just so I can use that Class-10 microSD card in the camera for which it was purchased (needed to take photos WHILE filming 1080p video), I am now speed testing my 16GB Class-2 microSD card. The class rating in the MINIMUM write speed, but cards are often faster (downmarked as the market demands).

This Class-2 microSD card measured 5MB/s write and 22MB/sec read speed, faster than some of my Class-4 SD cards. And its read speed is even faster than that class-10 card measured above (though writes are slower).

Really though, in the end, the only thing that will matter to improve storage speed is COMPRESSION (i.e. squashfs or jffs2) and I was hoping for RAM compression too (zram, or compcache if I need old code for K1 compatibility). The I/O channels on the K1 are just slow, so it is something to work around however we can... But then, newer kindles might not be all that much faster either (speed tests needed).

05-24-2016, 07:53 PM	#297
geekmaster Carpe diem, c'est la vie. Posts: 6,433 Karma: 10773670 Join Date: Nov 2011 Location: Multiverse 6627A Device: K1 to PW3	Just so I can use that Class-10 microSD card in the camera for which it was purchased (needed to take photos WHILE filming 1080p video), I am now speed testing my 16GB Class-2 microSD card. The class rating in the MINIMUM write speed, but cards are often faster (downmarked as the market demands). This Class-2 microSD card measured 5MB/s write and 22MB/sec read speed, faster than some of my Class-4 SD cards. And its read speed is even faster than that class-10 card measured above (though writes are slower). Really though, in the end, the only thing that will matter to improve storage speed is COMPRESSION (i.e. squashfs or jffs2) and I was hoping for RAM compression too (zram, or compcache if I need old code for K1 compatibility). The I/O channels on the K1 are just slow, so it is something to work around however we can... But then, newer kindles might not be all that much faster either (speed tests needed). Last edited by geekmaster; 05-24-2016 at 07:56 PM.