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Latency Comparison Numbers Time Light Distance Approximate Light Distance | |
-------------------------- ---- -------------- -------------------------- | |
L1 cache reference 0.5 ns 0.15 m Diagonal across your smartphone | |
Branch mispredict 5 ns 1.5 m Height of Natalie Portman | |
L2 cache reference 7 ns 2.1 m Height of Shaq | |
Mutex lock/unlock 25 ns 7.5 m Height of a school flag pole | |
Main memory reference 100 ns 30 m Half a Manhattan city block (North/South) | |
Compress 1K bytes with Zippy 3,000 ns 900 m Width of Central Park | |
Send 1K bytes over 1 Gbps network 10,000 ns 3,000 m Width of Manhattan | |
Read 4K randomly from SSD* 150,000 ns 45,000 m NYC to Hempstead on Long Island |
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#!/usr/bin/env ruby | |
# | |
# This code snippet shows how to enable SSL in Sinatra+Thin. | |
# | |
require 'sinatra' | |
require 'thin' | |
class MyThinBackend < ::Thin::Backends::TcpServer | |
def initialize(host, port, options) |
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Go to Preferences... > Profiles > Keys | |
Press Load Preset... | |
Select Natural Text Editing | |
Then, you can move a word backwards using Option ⌥ + ← and a word forwards using Option ⌥ + →, move to the start of the line using fn + ← and to the end of the line with fn + →. Also you can delete a word backwards using Option ⌥ + ⌫, delete the whole line using Command ⌘ + ⌫. | |
If the preset doesn't appear, reinstall iTerm2. If you installed it using Homebrew+Cask: | |
brew cask reinstall iterm2 | |
Also add undo as a Profile > Keys |