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Senthil Arivudainambi sent-hil

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@jboner
jboner / latency.txt
Last active May 11, 2024 04:16
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
@debasishg
debasishg / gist:8172796
Last active May 10, 2024 13:37
A collection of links for streaming algorithms and data structures

General Background and Overview

  1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
  2. Models and Issues in Data Stream Systems
  3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
  4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
  5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t
@KartikTalwar
KartikTalwar / Documentation.md
Last active May 9, 2024 12:59
Rsync over SSH - (40MB/s over 1GB NICs)

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

  • a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
  • H: preserves hard-links
  • A: preserves ACLs
@JoshuaEstes
JoshuaEstes / 000-Cheat-Sheets.md
Last active May 1, 2024 04:03
Developer Cheat Sheets for bash, git, gpg, irssi, mutt, tmux, and vim. See my dotfiles repository for extra info.
@nocturnalgeek
nocturnalgeek / MailinatorAliases
Last active April 8, 2024 20:45
A list of alternate domains that point to @mailinator.com
@binkmail.com
@bobmail.info
@chammy.info
@devnullmail.com
@letthemeatspam.com
@mailinater.com
@mailinator.net
@mailinator2.com
@notmailinator.com
@reallymymail.com
@mikeyk
mikeyk / gist:1329319
Created October 31, 2011 22:56
Testing storage of millions of keys in Redis
#! /usr/bin/env python
import redis
import random
import pylibmc
import sys
r = redis.Redis(host = 'localhost', port = 6389)
mc = pylibmc.Client(['localhost:11222'])
@kachayev
kachayev / concurrency-in-go.md
Last active March 11, 2024 11:27
Channels Are Not Enough or Why Pipelining Is Not That Easy
@UnquietCode
UnquietCode / Lava Lamp RNG.md
Created April 19, 2015 18:52
Lava Lamp Random Number Generator

Lava Lamp Random Number Generator

(extracted from the now defunct SGI project at http://lavarand.sgi.com/cgi-bin/how.cgi via the magical Internet Archive Wayback Machine)

Lava Lamps can be used as a source of randomness, which can be used to establish a random number generator. The output of the RNG can then be consumed by various computer applications.

Step 1: Establish a chaotic system

(Set up Lava Lite® lamps in a machine room.)

@jpillora
jpillora / sshd.go
Last active December 17, 2023 16:27
Go SSH server complete example - Read more here https://blog.gopheracademy.com/go-and-ssh/
// A small SSH daemon providing bash sessions
//
// Server:
// cd my/new/dir/
// #generate server keypair
// ssh-keygen -t rsa
// go get -v .
// go run sshd.go
//
// Client:
@drewolson
drewolson / reflection.go
Last active November 20, 2023 09:39
Golang Reflection Example
package main
import (
"fmt"
"reflect"
)
type Foo struct {
FirstName string `tag_name:"tag 1"`
LastName string `tag_name:"tag 2"`