04-30-2016, 03:16 AM
(04-30-2016, 02:55 AM)xrez Wrote: So looking at it the transcend only beats the kingston in speed at the random writing parts, but i find the speed in the pine64 from those 2 cards really different as the transcend loads things up faster and doest hang as much. Is the random write speed really that differentiating?
Funny, isn't it?
The 'faster' Kingston that clearly shows better sequential speeds is over 4 times slower regarding random I/O and therefore the whole Android system starts to stutter. This is the reason why Android devices normally have onboard eMMC that is magnitudes faster than your (still rather) slow Transcend card.
Combining slow storage (the average SD card pulled out of a camera) with Android/RemixOS is a simple recipe to get worst user experience ever. Well known since ages.
BTW: Same applies to 'Linux as Desktop', when you start to monitor I/O behaviour and watch Firefox for example opening up a couple of SQLite databases and being stuck in I/O it's also obvious that you have to take care of storage that shows high IOPS at random writes with small sector/block sizes. Speed class is close to irrelevant since this is only about large sequential reads/writes. And now take a look into Pine64's wiki or the so called 'freshman guide' what recommendations are written there.