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@prehensilecode

prehensilecode/latency.csv

Last active July 9, 2016 19:55
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latency.csv
#Operation Latency (ns) Comment
L1 cache reference 0.5
Branch mispredict 5
L2 cache reference 7 14x L1 cache
Mutex lock/unlock 25
Main memory reference 100 20x L2 cache 200x L1 cache
Compress 1K bytes with Zippy 3000
Send 1K bytes over 1 Gbps network 10000
Read 4K randomly from SSD 150000 ~1GB/sec SSD
Read 1 MB sequentially from memory 250000
Round trip within same datacenter 500000
Read 1 MB sequentially from SSD 1000000 ~1GB/sec SSD 4X memory
Disk seek 10000000 20x datacenter roundtrip
Read 1 MB sequentially from disk 20000000 80x memory 20X SSD
Send packet CA->Netherlands->CA 150000000
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Converted from https://gist.github.com/jboner/2841832

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