Latency Numbers Flashcards
(13 cards)
1
Q
L1 cache reference
A
0.5 ns
2
Q
Branch misprediction
A
5 ns
3
Q
L2 cache reference
A
7 ns
4
Q
Mutex lock/unlock
A
100 ns
5
Q
Main memory reference
A
100 ns
6
Q
Compress 1 KB with Zippy
A
10,000 ns
7
Q
Send 2 KB over 1 Gbps network
A
20,000 ns
0.2 ms
8
Q
Read 1 MB sequentially from memory
A
250,000 ns
0.25 ms
9
Q
Round trip within same datacenter
A
500,000 ns
0.5 ms
10
Q
Disk seek
A
10,000,000 ns
10 ms
11
Q
Read 1 MB sequentially from 1 Gbps network
A
10,000,000 ns
10 ms
13
Q
Send packet CA ➡️ Netherlands ➡️ CA
A
150,000,000 ns
150 ms
14
Q
Read 1 MB sequentially from disk
A
30,000,000 ns
30 ms
