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@jboner
jboner / latency.txt
Last active June 21, 2024 17:41
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
@MohamedAlaa
MohamedAlaa / tmux-cheatsheet.markdown
Last active June 21, 2024 01:45
tmux shortcuts & cheatsheet

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname
@1wErt3r
1wErt3r / SMBDIS.ASM
Created November 9, 2012 22:27
A Comprehensive Super Mario Bros. Disassembly
;SMBDIS.ASM - A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY
;by doppelganger (doppelheathen@gmail.com)
;This file is provided for your own use as-is. It will require the character rom data
;and an iNES file header to get it to work.
;There are so many people I have to thank for this, that taking all the credit for
;myself would be an unforgivable act of arrogance. Without their help this would
;probably not be possible. So I thank all the peeps in the nesdev scene whose insight into
;the 6502 and the NES helped me learn how it works (you guys know who you are, there's no
@plentz
plentz / nginx.conf
Last active June 21, 2024 14:21
Best nginx configuration for improved security(and performance)
# to generate your dhparam.pem file, run in the terminal
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048
@huonw
huonw / blackmagic.rs
Created January 15, 2014 12:42
do-while loops in Rust
while {
let x = foo();
bar(x);
x != 0
} {}
@lttlrck
lttlrck / gist:9628955
Created March 18, 2014 20:34
rename git branch locally and remotely
git branch -m old_branch new_branch # Rename branch locally
git push origin :old_branch # Delete the old branch
git push --set-upstream origin new_branch # Push the new branch, set local branch to track the new remote
@Robertof
Robertof / pasteling.sh
Last active August 29, 2015 13:57
pasteling.sh - a Bash script for Pasteling. Please check out the help with `pasteling -h`.
#!/usr/bin/env bash
PL_VERSION="1.1.1"
PL_KEY=""
PL_LANG=""
PL_FULLPAGE=""
PL_URL="http://pasteling.giovannicapuano.net/api"
command -v curl >/dev/null 2>&1 || \
{ echo >&2 "This script requires 'curl'. Aborting."; exit 2; }
command -v rev >/dev/null 2>&1 || \
@ndarville
ndarville / webm.md
Last active September 30, 2023 18:56
4chan’s guide to converting GIF to WebM - https://boards.4chan.org/g/res/41212767

Grab ffmpeg from https://www.ffmpeg.org/download.html

It's a command line tool which means you will have to type things with your keyboard instead of clicking on buttons.

The most trivial operation would be converting gifs:

ffmpeg -i your_gif.gif -c:v libvpx -crf 12 -b:v 500K output.webm
  • -crf values can go from 4 to 63. Lower values mean better quality.
  • -b:v is the maximum allowed bitrate. Higher means better quality.
@JunichiIto
JunichiIto / alias_matchers.md
Last active June 20, 2024 20:07
List of alias matchers in RSpec 3

This list is based on aliases_spec.rb.

You can see also Module: RSpec::Matchers API.

matcher aliased to description
a_truthy_value be_truthy a truthy value
a_falsey_value be_falsey a falsey value
be_falsy be_falsey be falsy
a_falsy_value be_falsey a falsy value
@steveklabnik
steveklabnik / wc.rs
Created March 23, 2015 21:50
a little wc-like in rust
#![feature(collections)]
use std::io::prelude::*;
use std::fs::File;
use std::io::BufReader;
fn main() {
let args: Vec<String> = std::env::args().collect();
let filename = args[1].clone();