I hate GMail, but sometimes you gotta. They're notoriously awful at deleting lots of messages at once, as their own search engine will tell you. I had more than 1,000,000 messages I needed to purge and couldn't do it using their own tools. So I wrote my own.
David Cohen groovemonkey
hellerbarde
/ latency.markdown
Created
May 31, 2012 13:16
— forked from jboner/latency.txt
Latency numbers every programmer should know
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 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs