On Sunday, 9 August 2015 at 10:40:06 UTC, Nordlöw wrote:
On Sunday, 9 August 2015 at 00:50:16 UTC, Ali Çehreli wrote:
Ali
Now benchmarks write and read separately:
I benchmarked my first results:
D:\visd\raw\raw\Release>raw
time write msecs:457
time read msecs:75
This is for 160MB of data. The write includes initialization of
the values.
The read time is faster than my ssd drive, so I have to assume
this is win7 or the ssd caching the data.
If I increase double count to 200,000,000 (to 1.6GB of data), the
times are:
D:\visd\raw\raw\Release>raw
time write msecs:7236
time read msecs:11979
08/09/2015 10:12 AM 1,600,000,000 numberList.db
So that's around 220MB/sec for the writes and 133MB/sec for the
reads. That's an intel 520 series 180GB ssd, but in an SATA
3Gb/s interface in a laptop. Sequential write speed for that ssd
should be about 257MB/sec. Sequential read should be close to
395MB/sec for this drive on a 6Gb/sec SATA. So read speed is
lower than I'd expect.
If I move this program over to my work computer, the same 1.6GB
measurement returns these times below on a Samsung 840 SSD, which
is on a 6Gb/sec SATA interface. I believe the 458MB/sec write
speeds. I suspect the read timing is again just measuring win7's
cached data.
J:\visd>raw
time write msecs:3489
time read msecs:579
