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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 |
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#!/bin/bash | |
# Script for installing tmux on systems where you don't have root access. | |
# tmux will be installed in $HOME/local/bin. | |
# It's assumed that wget and a C/C++ compiler are installed. | |
# exit on error | |
set -e | |
TMUX_VERSION=1.8 |
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import socket | |
from BaseHTTPServer import HTTPServer | |
from SimpleHTTPServer import SimpleHTTPRequestHandler | |
class MyHandler(SimpleHTTPRequestHandler): | |
def do_GET(self): | |
if self.path == '/ip': | |
self.send_response(200) | |
self.send_header('Content-type', 'text/html') | |
self.end_headers() |
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Tmux is a "terminal multiplexer", it enables a number of terminals to be accessed and controlled from a single terminal. | |
If you use Debian/Ubuntu, you can just run apt-get install tmux, and voila. | |
Since the title was about centos 7, then do the following step to install tmux. | |
(1). tmux has a library dependency on libevent which, of course, isn’t installed by default. | |
$ wget https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz | |
$ tar xzvf libevent-2.0.21-stable.tar.gz | |
$ cd libevent-2.0.21-stable | |
$ ./configure && make |
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[Unit] | |
Description=Shadowsocks Server | |
After=network.target | |
[Service] | |
ExecStart=/usr/local/bin/ssserver -c /etc/shadowsocks/ss-config.json | |
Restart=on-abort | |
[Install] | |
WantedBy=multi-user.target |
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# See https://github.com/rikumi/iconsur | |
yarn global add iconsur | |
sudo iconsur set /Applications/Android\ File\ Transfer.app -k Airdroid | |
sudo iconsur set /Applications/Android\ Studio.app/ -l -c 7a5 -s 0.8 | |
sudo iconsur set /Applications/DaisyDisk.app/ -l | |
sudo iconsur set /Applications/Decompressor.app/ -l | |
sudo iconsur set /Applications/Discord.app/ | |
sudo iconsur set /Applications/Google\ Chrome.app/ | |
sudo iconsur set /Applications/IINA.app/ -l -c 161d22 |