Skip to content

Instantly share code, notes, and snippets.

View LegendZhu's full-sized avatar

Legend LegendZhu

12 followers · 17 following
  • beijing
View GitHub Profile
@LegendZhu
LegendZhu / rsa.java
Created August 26, 2020 09:09 — forked from jbrown17/rsa.java
Quick, simple implementation of RSA encryption algorithm without external libraries
import java.awt.EventQueue;
import java.io.*;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;
/**
* Quick and dirty implementation of the RSA algorithm
@LegendZhu
LegendZhu / cf-invalidate.php
Created April 25, 2019 13:48 — forked from claylo/cf-invalidate.php
How to invalidate items in AWS CloudFront
<?php
/**
* Super-simple AWS CloudFront Invalidation Script
*
* Steps:
* 1. Set your AWS access_key
* 2. Set your AWS secret_key
* 3. Set your CloudFront Distribution ID
* 4. Define the batch of paths to invalidate
* 5. Run it on the command-line with: php cf-invalidate.php
@LegendZhu
LegendZhu / index.js
Created April 12, 2019 08:30 — forked from edokeh/index.js
佛祖保佑，永无 BUG
//
// _oo0oo_
// o8888888o
// 88" . "88
// (| -_- |)
// 0\ = /0
// ___/`---'\___
// .' \\| |// '.
// / \\||| : |||// \
// / _||||| -:- |||||- \
@LegendZhu
LegendZhu / Mabdelbrot.java
Created March 22, 2019 02:50 — forked from dstogov/Mabdelbrot.java
// by Erik Wrenholt
import java.util.*;
class Mandelbrot
{
static int BAILOUT = 16;
static int MAX_ITERATIONS = 1000;
private static int iterate(float x, float y)
{
@LegendZhu
LegendZhu / kong-api.md
Created January 30, 2019 07:12 — forked from claritee/kong-api.md
Kong API Notes
@LegendZhu
LegendZhu / latency.txt
Created December 18, 2017 15:44 — forked from jhclark/latency.txt
Latency numbers every programmer should know
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
Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
Read 1 MB sequentially from memory 250,000 ns 0.25 ms
Round trip within same datacenter 500,000 ns 0.5 ms
Read 1 MB sequentially from SSD 1,000,000 ns 1 ms 4X memory
@LegendZhu
LegendZhu / latency.md
Created December 18, 2017 15:43 — forked from marianposaceanu/latency.md
Latency numbers every programmer should know

CPU

  • L1 cache reference 0.5 ns
  • Branch mispredict 5 ns (on a bad CPU architecture you're pretty much screwed)
  • L2 cache reference 7 ns
  • Mutex lock/unlock 25 ns
  • Main memory reference 100 ns
  • Compress 1K bytes with Zippy 3,000 ns
  • Send 2K bytes over 1 Gbps network 20,000 ns
  • Read 1 MB sequentially from memory 250,000 ns
@LegendZhu
LegendZhu / php-html-css-js-minifier.php
Created August 10, 2016 10:21 — forked from taufik-nurrohman/php-html-css-js-minifier.php
PHP Function to Minify HTML, CSS and JavaScript
<?php
/**
* ----------------------------------------------------------------------------------------
* Based on `https://github.com/mecha-cms/mecha-cms/blob/master/engine/plug/converter.php`
* ----------------------------------------------------------------------------------------
*/
@LegendZhu
LegendZhu / digg_reader_subscriptions.xml
Created December 31, 2015 12:28 — forked from island205/digg_reader_subscriptions.xml
my rss list
<?xml version="1.0" encoding="UTF-8" ?>
<opml version="1.0">
<head>
<title>寸志 subscriptions in Digg Reader</title>
</head>
<body>
<outline text="Framer Blog" title="Framer Blog" type="rss" xmlUrl="http://framerjs.tumblr.com/rss" htmlUrl="http://framerjs.tumblr.com/" />
<outline text="粉丝日志" title="粉丝日志" type="rss" xmlUrl="http://blog.fens.me/feed/" htmlUrl="http://blog.fens.me" />
<outline text="AngularJS" title="AngularJS" type="rss" xmlUrl="http://blog.angularjs.org/feeds/posts/default" htmlUrl="http://blog.angularjs.org/" />
<outline text="blog.izs.me" title="blog.izs.me" type="rss" xmlUrl="http://blog.izs.me/rss" htmlUrl="http://blog.izs.me/" />
@LegendZhu
LegendZhu / latency.txt
Last active August 29, 2015 14:19 — forked from jboner/latency.txt
Latency Comparison Numbers
--------------------------
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
Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
Read 4K randomly from SSD* 150,000 ns 0.15 ms