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" copy all this into a vim buffer, save it, then... | |
" source the file by typing :so % | |
" Now the vim buffer acts like a specialized application for mastering vim | |
" There are two queues, Study and Known. Depending how confident you feel | |
" about the item you are currently learning, you can move it down several | |
" positions, all the way to the end of the Study queue, or to the Known | |
" queue. | |
" type ,, (that's comma comma) |
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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 |
To run this, you can try:
curl -ksO https://gist.githubusercontent.com/nicerobot/2697848/raw/uninstall-node.sh
chmod +x ./uninstall-node.sh
./uninstall-node.sh
rm uninstall-node.sh
Get Homebrew installed on your mac if you don't already have it
Install highlight. "brew install highlight". (This brings down Lua and Boost as well)
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# Simple, scrappy UDP DNS server in Ruby (with protocol annotations) | |
# By Peter Cooper | |
# | |
# MIT license | |
# | |
# * Not advised to use in your production environment! ;-) | |
# * Requires Ruby 1.9 | |
# * Supports A and CNAME records | |
# * See http://www.ietf.org/rfc/rfc1035.txt for protocol guidance | |
# * All records get the same TTL |
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