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Deep Learning
book

Deep Learning

by Josh Patterson, Adam Gibson
August 2017
Intermediate to advanced content levelIntermediate to advanced
530 pages
13h 23m
English
O'Reilly Media, Inc.
Content preview from Deep Learning

Appendix C. Numbers Everyone Should Know

Table C-1 lists the numbers everyone should know, also known as “Jeff Dean’s 12 Numbers.”

Table C-1. Jeff Dean’s 12 numbers
Computer architecture operation Duration (in nanoseconds)
L1 cache reference 0.5
Branch mispredict 5
L2 cache reference 7
Mutex lock/unlock 100
Main memory reference 100
Compress 1 KB with Zippy 10,000
Send 2 KB over 1 Gbps network 20,000
Read 1 MB sequentially from memory 250,000
Roundtrip within same datacenter 500,000
Disk seek 10,000,000
Read 1 MB sequentially from network 10,000,000
Read 1 MB sequentially from disk 30,000,000
Send packet CA->Netherlands->CA 150,000,000
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Publisher Resources

ISBN: 9781491924570Errata PageSupplemental Content