Skip to content

Instantly share code, notes, and snippets.

@phelma
phelma / latency.txt
Created July 18, 2016 12:01 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
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 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
#!/bin/bash
# A simple script to backup an organization's GitHub repositories.
GHBU_BACKUP_DIR=${GHBU_BACKUP_DIR-"github-backups"} # where to place the backup files
GHBU_ORG=${GHBU_ORG-"autographer"} # the GitHub organization whose repos will be backed up
GHBU_API=${GHBU_API-"https://api.github.com"} # base URI for the GitHub API
GHBU_GITHOST=${GHBU_GITHOST-"<CHANGE-ME>.github.com"} # the GitHub hostname (see comments)
# I recommend using an API token so it is easily trackable and removable.
# Note that you MUST have SSH keys for a user with the access to all repos set up
#!/bin/bash
# s3-to-AWStat
# Copyright 2013 Xavier Decuyper
# http://www.savjee.be
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
#!/bin/bash
# s3-to-AWStat
# Copyright 2013 Xavier Decuyper
# http://www.savjee.be
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,