Md. Sumon Islam sumonst21

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

	import requests
	import asyncio
	from timeit import default_timer
	from concurrent.futures import ThreadPoolExecutor

	START_TIME = default_timer()

	def request(session, i):
	url = "https://jsonplaceholder.typicode.com/photos"
	with session.get(url) as response:

	import requests
	from timeit import default_timer


	def request(session):
	url = "https://jsonplaceholder.typicode.com/photos"
	with session.get(url) as response:
	data = response.text
	if response.status_code != 200:
	print("FAILURE::{0}".format(url))

	<?php

	// process $_POST request
	if(isset($_POST["submitDropzone"])) {
	// Do something
	print_r($_POST);
	}

	?>

	#!/bin/bash

	# Fetch Cloudflare log data for a given Ray ID
	# Please note that the Ray ID is the first part of `CF-RAY` (4a807f60ca5727a4-FRA -> 4a807f60ca5727a4)

	CF_ZONE=${1}
	RAY_ID=${2}

	if ! host -N 0 "${CF_ZONE}" 2>&1 > /dev/null; then
	echo "Invalid domain '${CF_ZONE}'"

	<?php
	function verify_captcha($token) {

	$threshold = 0.5; // Score must be > threshold to pass captcha.
	// Default is 0.5, although the majority of users will get 0.9
	$sites = ["localhost", "nachotoast.com", "ntgc.ddns.net"]; // Site names string, e.g. sub.domain.com:8080

	$secret = "Put your client secret here.";
	$url = "https://www.google.com/recaptcha/api/siteverify";
	$data = array("secret" => $secret, "response" => $token);

	<?php
	/**
	* Timing Class for benchmarking in PHP
	* @ref: http://www.if-not-true-then-false.com/2010/php-timing-class-class-for-measure-php-scripts-execution-time-and-php-web-page-load-time/
	*/
	class Timing {
	private $break;
	private $start_time;
	private $stop_time;

	<?php
	/**
	* Dump MySQL database
	*
	* Here is an inline example:
	* <code>
	* $connection = @mysql_connect($dbhost,$dbuser,$dbpsw);
	* $dumper = new MySQLDump($dbname,'filename.sql',false,false);
	* $dumper->doDump();
	* </code>