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Aizhan Toregozhina atoregozh

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Super basic bash guide

This guide meant to help absolute beginners use the command line on Mac and Linux computers. For windows, you'll need to install the git command line tool or cygwin in order to use these commands. For Mac, you can open the command line with the Terminal application, inside Applications > Utilities.

This guide is supposed to be brief enough to be learned in a few minutes. For more in-depth guidance on using the command line, try this tutorial or this tutorial. Please feel free to leave comments suggesting changes,

atoregozh / latency.txt
Created Aug 19, 2016 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
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Latency Comparison Numbers
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 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
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