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

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

xqm32

##### 使用说明 #####
# 1. 请填写 proxy-providers - subscribe - url 为订阅链接
# 2. 下载 https://github.com/Loyalsoldier/clash-rules/archive/refs/heads/release.zip 并解压至 ./profiles/ruleset 文件夹下
# 3. 若需要自动更新 ruleset, 请编辑 rule-providers-config - type 为 http

##### 参考链接 #####
# 1. clash 样例配置文件
#    https://lancellc.gitbook.io/clash/clash-config-file/an-example-configuration-file
# 2. clash 规则集
#    https://github.com/Loyalsoldier/clash-rules

bmaupin

ⓘ This list is not meant to be exhaustive and is not guaranteed to be maintained. See the comments for updates and alternative options.

(Items in bold indicate possible concerns)

	Keycloak	WSO2 Identity Server	Gluu	CAS	OpenAM	Shibboleth IdP
OpenID Connect/OAuth support	yes	yes	yes	yes	yes	yes
Multi-factor authentication	yes	yes	yes	yes	yes	yes
Admin UI	yes	yes	yes	yes	yes	no
OpenJDK support	yes	yes	partial²	yes

nerdalert

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

lucasfais

Sublime Text 2 – Useful Shortcuts (Mac OS X)

General

⌘T	go to file
⌘⌃P	go to project
⌘R	go to methods
⌃G	go to line
⌘KB	toggle side bar
⌘⇧P	command prompt

kconragan

# Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key
# that enables you to choose a character from a menu of options. If you are on Lion
# try it by pressing and holding down 'e' in any app that uses the default NSTextField
# for input.
#
# It's a nice feature and continues the blending of Mac OS X and iOS features. However,
# it's a nightmare to deal with in Sublime Text if you're running Vintage (Vim) mode,
# as it means you cannot press and hold h/j/k/l to move through your file. You have
# to repeatedly press the keys to navigate.

hongymagic

This is a simple script to launch iA Writer from the terminal. It is extremely useful for interacting with Github's own wiki system as it provides git access.

INSTALL

One-liner

curl -L https://raw.github.com/gist/2025540/4f3f094286468db2588f40345e6faaf07bd5af2a/ia > /usr/local/bin/ia && chmod u+x /usr/local/bin/ia

Manual, safer way

rooreynolds

#Completed tasks (showing their title, start date, completion date and time to complete in days)
sqlite3 -csv -header ~/Library/Application\ Support/Cultured\ Code/Things\ beta/ThingsLibrary.db "SELECT
substr(ZTITLE,0,26) as title,
datetime(ZCREATIONDATE, 'unixepoch', '+31 years', 'localtime') as startdate, 
datetime(ZSTOPPEDDATE, 'unixepoch', '+31 years', 'localtime') as completeddate,
round(julianday(datetime(ZSTOPPEDDATE, 'unixepoch', '+31 years', 'localtime')) - julianday
(datetime(ZCREATIONDATE, 'unixepoch', '+31 years', 'localtime')),5) as age 
FROM ZTHING WHERE ZSTATUS = 3 ORDER BY completeddate;