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@econchick
econchick / gist:4666413
Last active January 19, 2026 15:03
Python implementation of Dijkstra's Algorithm
class Graph:
def __init__(self):
self.nodes = set()
self.edges = defaultdict(list)
self.distances = {}
def add_node(self, value):
self.nodes.add(value)
def add_edge(self, from_node, to_node, distance):
@jboner
jboner / latency.txt
Last active March 5, 2026 05:50
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
@spicycode
spicycode / tmux.conf
Created September 20, 2011 16:43
The best and greatest tmux.conf ever
# 0 is too far from ` ;)
set -g base-index 1
# Automatically set window title
set-window-option -g automatic-rename on
set-option -g set-titles on
#set -g default-terminal screen-256color
set -g status-keys vi
set -g history-limit 10000
@pksunkara
pksunkara / config
Last active February 26, 2026 21:09
Sample of git config file (Example .gitconfig) (Place them in $XDG_CONFIG_HOME/git)
# vi: ft=dosini
[user]
name = Pavan Kumar Sunkara
email = [email protected]
username = pksunkara
[core]
editor = nvim
whitespace = fix,-indent-with-non-tab,trailing-space,cr-at-eol
pager = delta
[column]
@thisivan
thisivan / .zshrc
Created February 11, 2011 22:07
Enable Vim mode in ZSH
# Enable Vim mode in ZSH
bindkey -v
autoload -U edit-command-line
zle -N edit-command-line
bindkey '^E' edit-command-line # Opens Vim to edit current command line
bindkey '^R' history-incremental-search-backward # Perform backward search in command line history
bindkey '^S' history-incremental-search-forward # Perform forward search in command line history
bindkey '^P' history-search-backward # Go back/search in history (autocomplete)
bindkey '^N' history-search-forward # Go forward/search in history (autocomplete)
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "bigint.h"
/* this library provides for a bigint type, which can hold numbers of an unlimited length.
You can add them together as well.*/