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Unimpressive write performance
on October 6, 2015
Like so many SD cards I have tried, this card has dreadful performance on small writes. Unlike so many other SD cards I have tested, its performance on larger but randomly placed writes is merely poor, and I do not see long stalls when the load includes a mix of reads and writes. Naturally, the read performance is where the maker clearly concentrated.
For linear reads, I saw over 75MB/s, for large random reads, over 55MB/s. For write performance, it cleared 13MB/s linear and 3MB/s large random (most cards I have tested can't hold 1MB/s for large random writes). The small random reads were over 6MB/s. The <1MB/s small random writes were a bit disappointing, though, and the just better than zero transfer rate with multiple outstanding writes says the card can't deal with multiple streams at once. Copying a set of files that ranged up to 100MB per file (with an average over 1MB per file) achieved around 4MB/s.
Overall, it could be tolerable as a file storage card, and it looks like it might make a useable camera card if your camera has a reasonable write buffer.
The 32GB version of this card has clearly better write performance and does not choke on multiple streams; I would recommend it instead, unless your device can not handle it.
I have had no issues with corruption or data loss so far, but I have not had this card a long time.