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计算机和网络的速度参考值

2012-03-22 17:52 148 查看
L1 cache reference0.5 ns
Branch mispredict5 ns
L2 cache reference7 ns
Mutex lock/unlock100 ns
Main memory reference100 ns
Compress 1K bytes with Zippy10,000 ns
Send 2K bytes over 1 Gbps network20,000 ns
Read 1 MB sequentially from memory250,000 ns
Round trip within same datacenter500,000 ns
Disk seek10,000,000 ns
Read 1 MB sequentially from network10,000,000 ns
Read 1 MB sequentially from disk30,000,000 ns
Send packet CA->Netherlands->CA150,000,000 ns
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