This is much closer to random access than sequential access.
Counter question: How is appending to a log file repeatedly sequential access?<p>No meta data or other interaction required? Surely the sequential writes benefit from larger buffers?
Not to mention that the flash block is way larger than the appended message. You would need TRIM to not make that an extremely wasteful operation, not sure if the typical Pi installations make use of it but a quick google seems to indicate that it at least has been a problem. So writing that 1 kbit now means reading a whole block, edit the content of it, and writing that whole block back - which is hardly sequential either. 1 Mbit&#x2F;s is starting to seem pretty fast.<p>The only pathological case here is the &quot;not optimal sequential write case&quot;, which sure is enough to kill any random USB-thumbdrive or SD-card. Just copying two files two a thumdrive at once can kill performance by an order of magnitude compared to doing them one after another.