krast

#!/bin/bash
## Fix OneDrive for Mac CPU usage
## 
## Seems this is still a problem 5 years later after I created this little gist.
## I have long since stopped using OneDrive (luckily), but according to
## comments below, I have added the new path for OfficeFileCache for macOS
## Mojave (10.14) and Catalina (10.15).

## Run this on macOS Mojave (10.14) and Catalina (10.15)
find ~/Library/Containers/ -type d -name OfficeFileCache -exec rm -r {} +

krast

Slides for Re:Invent conference

• Re:Invent 2018
• Re:Invent 2017
• Re:Invent 2016
• Re:Invent 2015
• Re:Invent 2014
• Re:Invent 2013
• Re:Invent 2012

krast

brew install zplug
vi ~/.zshrc
source ~/.zshrc

krast

# Clean, simple, compatible and meaningful.
# Tested on Linux, Unix and Windows under ANSI colors.
# It is recommended to use with a dark background.
# Colors: black, red, green, yellow, *blue, magenta, cyan, and white.
#
# Mar 2020 Krast
# E-mail: krast@live.cn

# logo gnerv
gnerv="$FG[238]

krast

TCPKeepAlive yes
ServerAliveInterval 60
ServerAliveCountMax 10
StrictHostKeyChecking no
UserKnownHostsFile /dev/null

Host jumpserver
  User krast
  Hostname jumpserver.krast.net
  Port 6666

krast

#!/bin/bash

CLEAR='\033[0m'
RED='\033[0;31m'

function usage() {
  if [ -n "$1" ]; then
    echo -e "${RED}👉 $1${CLEAR}\n";
  fi
  echo "Usage: $0 [-n number-of-people] [-s section-id] [-c cache-file]"

krast

参考链接
========

https://projectlombok.org/features/delombok
https://awhitford.github.io/lombok.maven/lombok-maven-plugin/usage.html

为什么需要查看lombok生成的源码?
===============================

主要原因有二:

krast

Basic Snake HTML Game

Snake is a fun game to make as it doesn't require a lot of code (less than 100 lines with all comments removed). This is a basic implementation of the snake game, but it's missing a few things intentionally and they're left as further exploration for the reader.

Further Exploration

• Score
  • When the snake eats an apple, the score should increase by one. Use context.fillText() to display the score to the screen
• Mobile and touchscreen support
• Allow the game to be scalled down to a phone size. See https://codepen.io/straker/pen/VazMaL

krast

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

krast

#!/bin/bash
zypper addrepo https://download.opensuse.org/repositories/home:/so_it_team:/12.x/SLE_12_SP3/home:so_it_team:12.x.repo
zypper addrepo https://download.opensuse.org/repositories/network:utilities/SLE_12_SP3/network:utilities.repo
zypper refresh
zypper install -y iperf tmux