Posted on 2012-08-07 08:00:00
Tags: Numbers, Hardware
L1 cache reference ............................. 0.5 ns Branch mispredict .............................. 5 ns L2 cache reference ............................. 7 ns Mutex lock/unlock ............................. 25 ns Main memory reference ........................ 100 ns Compress 1K bytes with Zippy ............... 3,000 ns (3 us) Send 2K bytes over 1 Gbps network ......... 20,000 ns (20 us) SSD random read .......................... 150,000 ns (150 us) Read 1 MB sequentially from memory ....... 250,000 ns (250 us) Round trip within same datacenter ........ 500,000 ns (500 us) Read 1 MB sequentially from SSD* ....... 1,000,000 ns (1 ms) Disk seek ............................. 10,000,000 ns (10 ms) Read 1 MB sequentially from disk ...... 20,000,000 ns (20 ms) Send packet AU -> Netherlands -> AU .. 320,000,000 ns (320 ms)| Share on Facebook | Share on Twitter