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@vratiu
vratiu / .bash_aliases
Last active October 20, 2025 00:46
Git shell coloring
# Customize BASH PS1 prompt to show current GIT repository and branch.
# by Mike Stewart - http://MediaDoneRight.com
# SETUP CONSTANTS
# Bunch-o-predefined colors. Makes reading code easier than escape sequences.
# I don't remember where I found this. o_O
# Reset
Color_Off="\[\033[0m\]" # Text Reset
@jboner
jboner / latency.txt
Last active November 2, 2025 13:31
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
@click0
click0 / random-ipv6-address-generator.sh
Created April 24, 2011 17:48
Random generator ipv6 addresses within your ipv6 network prefix.
#Random generator ipv6 addresses within your ipv6 network prefix.
#!/usr/local/bin/bash
# Copyright
# Vladislav V. Prodan
# universite@ukr.net
# 2011
array=( 1 2 3 4 5 6 7 8 9 0 a b c d e f )