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Changsu Jiang chsjiang

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@azinman
azinman / ClientBenchmark.scala
Created January 14, 2011 07:07
Testing 50k+ concurrent connections using netty
package com.mypackage.benchmark
import com.mypackage.util.Logging
import net.lag.configgy.Configgy
import scala.collection.mutable
import scala.collection.JavaConversions._
import java.net.InetSocketAddress
import java.nio.charset.Charset
import java.util.concurrent._
@casualjim
casualjim / WebSocketClient.scala
Created February 13, 2012 19:42
A Netty based WebSocket client and server in scala
package mojolly.io
import org.jboss.netty.bootstrap.ClientBootstrap
import org.jboss.netty.channel._
import socket.nio.NioClientSocketChannelFactory
import java.util.concurrent.Executors
import org.jboss.netty.handler.codec.http._
import collection.JavaConversions._
import websocketx._
import java.net.{InetSocketAddress, URI}
@jboner
jboner / latency.txt
Last active March 14, 2025 07:37
Latency Numbers Every Programmer Should Know
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
@macintux
macintux / Distributed systems meta-list.md
Last active October 24, 2024 00:50
List of distributed systems reading lists, plus miscellanea
@tsenart
tsenart / gist:5fc18c659814c078378d
Last active August 18, 2024 21:43
HTTP Closures
package main
import (
"net/http"
"database/sql"
"fmt"
"log"
"os"
)
@debasishg
debasishg / gist:b4df1648d3f1776abdff
Last active July 27, 2024 14:46
another attempt to organize my ML readings ..
  1. Feature Learning
  1. Deep Learning
@philwinder
philwinder / authorize.lua
Last active February 3, 2022 07:36
IVZ: Nginx config for using Lua as the authentication module. You must install nginx with lua support. See "openresty" for linux distros or the vagrant bootstrap shell script.
--[[
Provides custom authorization for nginx.
See the `nginx_authorize_by_lua.conf` for the Nginx config. This lua file is referenced in the config
See testWebserverAccess.sh for unit tests.
To Run nginx (make sure you have the lua, config and htpasswd file):
$ /usr/local/openresty/nginx/sbin/nginx -c /etc/nginx/conf/nginx_authorize_by_lua.conf
Logs are available at: /usr/local/openresty/nginx/logs/lua.log
To write to the log:
@nerdalert
nerdalert / Netfilter-IPTables-Diagrams.md
Last active February 6, 2025 00:07
Linux NetFilter, IP Tables and Conntrack Diagrams

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.

@leonardofed
leonardofed / README.md
Last active March 14, 2025 18:19
A curated list of AWS resources to prepare for the AWS Certifications


A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

@Phate6660
Phate6660 / rust recommendations and alternatives.md
Last active May 29, 2024 12:35
My growing list of Rust programs to use.