ubuntu-phone team mailing list archive

[Oliver Grawert <ogra@xxxxxxxxxx>]

hi,
Am Mittwoch, den 13.03.2013, 00:42 +0100 schrieb f69m:
...
>> i doubt the time for the enduser will make a difference ...
>> for the former images we had we finally decided to keep it in the
form
>> we have on the phablet images too now, it would be interesting if
>> someone could measure the time both ways take and compare them.
...
> Hmm, dd from /dev/zero takes longer than unpacking the same amount of
> data from a tar?
> That sounds really weird to me, as exactly the same amount of data is
> written to the device; though I have to admit I am not really a
> specialist on flash-based storage.
> Is there a known technical reason for this or is it empirical data?
consider that these were images for developer boards that run from plain
SD cards, then consider that you might only have a class2 card around ;)
this is the lower mark we had to set with the images for developer
boards.

this is likely a situation you wont find in a phone where you will have
slightly optimized eMMCs that can do more than 5-10MB/s, thats why i
said above that we should measure it again ;)

ciao
	oli

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