sandyjmacdonald

## This script will turn your Unicorn pHAT or Mood Light Kit into
## a Twitter-connected mood light that tracks the mood of your most
## recent tweets.

## You'll need to install the unicornhat, textblob, and tweepy Python
## libraries, and run "python -m textblob.download_corpora" to download
## the corpora for textblob the first time you run it.

## Change the start_hue and end_hue values to use a different portion of
## the colour wheel. Change num_tweets to track a larger number of recent

jboner

Latency Comparison Numbers (~2012)
----------------------------------
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