Poul-Henning Kamp wrote this message on Tue, May 12, 2015 at 06:31 +0000: > -------- > In message <20150512032307.GP37063_at_funkthat.com>, John-Mark Gurney writes: > > >Also, you'd probably see even better performance by increasing the > >size to 64k, [...] > > easy: > 8K on 32bit > 64k on 64bit Sounds good to me... Just for people who care... I did a quick set of benchmarks on sha256.. This is using my preliminary patch to use sse4 optimized sha256... But this should be the same for others... The numbers in ministat output are the time in seconds it takes my 3.4GHz AMD A10-5700 APU running HEAD to process a 512MB file, so lower numbers are better.. I've processed them into easier to read format: BUFSIZ: 145MB/sec 8k: 193MB/sec 16k: 198MB/sec 64k: 202MB/sec 128k: 202MB/sec -t: 211MB/sec x def.times + 8k.times * 16k.times % 64k.times # 128k.times +-------------------------------------------------------------------------+ |#% * + x | |#% * + x | |#% * + x | |## * + xx| |A| A A |A|| +-------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 5 3.53 3.55 3.53 3.536 0.0089442719 + 5 2.65 2.66 2.65 2.654 0.0054772256 Difference at 95.0% confidence -0.882 +/- 0.0108161 -24.9434% +/- 0.305885% (Student's t, pooled s = 0.0074162) * 5 2.58 2.59 2.58 2.584 0.0054772256 Difference at 95.0% confidence -0.952 +/- 0.0108161 -26.9231% +/- 0.305885% (Student's t, pooled s = 0.0074162) % 5 2.53 2.54 2.54 2.538 0.004472136 Difference at 95.0% confidence -0.998 +/- 0.0103127 -28.224% +/- 0.29165% (Student's t, pooled s = 0.00707107) # 5 2.53 2.54 2.53 2.532 0.004472136 Difference at 95.0% confidence -1.004 +/- 0.0103127 -28.3937% +/- 0.29165% (Student's t, pooled s = 0.00707107) -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."Received on Wed May 13 2015 - 06:03:50 UTC
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