h2oai

Undoing Merges:
If you want to revert a merge of two branches (and all related auto-merges)
 $ git revert -m 1 0bd44a32f10a7a4d1c8be6f57a8d9c0e1d210ea0
Kind of reverse-cherry-picking
http://git-scm.com/2010/03/02/undoing-merges.html

h2oai

L1 cache reference                            0.5 ns
Branch mispredict                             5   ns
L2 cache reference                            7   ns             14x L1 cache
Mutex lock/unlock                            25   ns
Main memory reference                       100   ns             20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy              3,000   ns
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD               150,000   ns    0.15 ms
Read 1 MB sequentially from memory      250,000   ns    0.25 ms
Round trip within same datacenter       500,000   ns    0.5  ms