mbbx6spp

Delegating web requests in Linux to correct browser profile

A few months ago I set this up and here is the write up on it since yesterday, while talking to a fellow Linux user, they found it intriguing.

My requirements

Any URL I click in Slack, Signal desktop app, or launch via terminal actions should launch into the correct sandboxed, user-profile web browser instance (in precedence order):

• https://github.com/<workorg>.* should open in the work Firefox profile

djspiewak

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

1. CPU-bound
2. Blocking IO
3. Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

travisbhartwell

NOTE: a more up-to-date version of this can be found on my blog

nix-shell and Shebang Lines

A few days ago, version 1.9 of the Nix package manager was released. From the release notes:

nix-shell can now be used as a #!-interpreter. This allows you to write scripts that dynamically fetch their own dependencies.

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

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

teamon

package controllers

import lib._
import play.api.mvc._
import play.api.libs.json._


object Auth extends Controller {

  val GITHUB = new OAuth2[GithubUser](OAuth2Settings(

mumrah

import time
import struct
import socket
import hashlib
import sys
from select import select
import re
import logging
from threading import Thread
import signal