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@jboner
jboner / latency.txt
Last active July 17, 2024 03:12
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
@CrookedNumber
CrookedNumber / gist:8964442
Created February 12, 2014 21:02
git: Removing the last commit

Removing the last commit

To remove the last commit from git, you can simply run git reset --hard HEAD^ If you are removing multiple commits from the top, you can run git reset --hard HEAD~2 to remove the last two commits. You can increase the number to remove even more commits.

If you want to "uncommit" the commits, but keep the changes around for reworking, remove the "--hard": git reset HEAD^ which will evict the commits from the branch and from the index, but leave the working tree around.

If you want to save the commits on a new branch name, then run git branch newbranchname before doing the git reset.

@mitchwongho
mitchwongho / Docker
Last active June 26, 2024 07:28
Docker 'run' command to start an interactive BaSH session
# Assuming an Ubuntu Docker image
$ docker run -it <image> /bin/bash
@randyburden
randyburden / CodeMirror_CurlyBraceWrappedText_Demo
Created October 21, 2014 23:21
CodeMirror Custom Syntax Highlighter for highlighting double curly brace wrapped text aka Mustache / Handlebars
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CurlyBraceWrappedText Demo</title>
<style type="text/css">
.CodeMirror {border: 1px solid black;}
.cm-CurlyBraceWrappedText {color: #CC0000; font-weight: bold;}
</style>
<link rel="stylesheet" href="css/codemirror.css">
@PurpleBooth
PurpleBooth / README-Template.md
Last active July 17, 2024 03:47
A template to make good README.md

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

@gene1wood
gene1wood / all_aws_managed_policies.json
Last active July 15, 2024 16:09
A list of all AWS managed policies and they're policy documents as well as a short script to generate the list
This file has been truncated, but you can view the full file.
{
"APIGatewayServiceRolePolicy": {
"Arn": "arn:aws:iam::aws:policy/aws-service-role/APIGatewayServiceRolePolicy",
"AttachmentCount": 0,
"CreateDate": "2019-10-22T18:22:01+00:00",
"DefaultVersionId": "v6",
"Document": {
"Statement": [
{
"Action": [
@tencia
tencia / moving_mnist.py
Last active April 9, 2024 18:52
from PIL import Image
import sys
import os
import math
import numpy as np
###########################################################################################
# script to generate moving mnist video dataset (frame by frame) as described in
# [1] arXiv:1502.04681 - Unsupervised Learning of Video Representations Using LSTMs
# Srivastava et al
@Bulat-Ziganshin
Bulat-Ziganshin / cuda+multi-gpu+openmp.cu
Created May 24, 2016 16:26
Example of using CUDA with Multi-GPU+OpenMP (compile with -Xcompiler /openmp)
#include<stdio.h>
#include<stdlib.h>
#include <cuda.h>
#include<omp.h>
#include <helper_functions.h>
#include <helper_cuda.h>
#include <cuda_runtime.h>
void fill_matrix(int *A, int fac, int m, int n)
{
@tony-gutierrez
tony-gutierrez / AWS_Single_LetsEncrypt.yaml
Last active March 7, 2024 11:29
AWS Elastic Beanstalk .ebextensions config for single instance free SSL using letsencrypt certbot and nginx. http://bluefletch.com/blog/domain-agnostic-letsencrypt-ssl-config-for-elastic-beanstalk-single-instances/
# Dont forget to set the env variable "certdomain", and either fill in your email below or use an env variable for that too.
# Also note that this config is using the LetsEncrypt staging server, remove the flag when ready!
Resources:
sslSecurityGroupIngress:
Type: AWS::EC2::SecurityGroupIngress
Properties:
GroupId: {"Fn::GetAtt" : ["AWSEBSecurityGroup", "GroupId"]}
IpProtocol: tcp
ToPort: 443
@laobubu
laobubu / ABOUT.md
Last active May 27, 2024 21:40
A very simple HTTP server in C, for Unix, using fork()

Pico HTTP Server in C

This is a very simple HTTP server for Unix, using fork(). It's very easy to use

How to use

  1. include header httpd.h
  2. write your route method, handling requests.
  3. call serve_forever("12913") to start serving on port 12913