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@jboner
jboner / latency.txt
Last active April 19, 2025 21:29
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
@castano
castano / hemicube.cpp
Created June 20, 2014 09:46
Hemicube Integrator
#include "hemicube.h"
#define PACK_HEMICUBES 1
static void get_hemicube_face_normal(int index, Vector3 *forward, Vector3 *left, Vector3 *up) {
// Unwrapped hemicube with positive-Z in the middle.
switch (index) {
case 0: *forward = Vector3(+1, 0, 0); *left = Vector3( 0, 1, 0); break;
@slorber
slorber / appIdentity.md
Last active August 14, 2016 16:22
A useful trick to share more easily React components across different applications

Intro

This pattern is for those of you that maintain multiple applications and need to build components that can be reused across all these apps. It won’t be useful if you build components meant to be reused in the same application.

Your typical app structure

If you use smart/dumb, or container/presentational components, which you should if you want your components to be at least a little reusable, your typical application might look like this:

@mattes
mattes / og.txt
Last active May 7, 2022 01:53
Open Graph debugger
http://ogp.me/
https://moz.com/blog/meta-data-templates-123
https://search.google.com/structured-data/testing-tool
https://developers.facebook.com/tools/debug/og/object - https://developers.facebook.com/docs/reference/opengraph
https://cards-dev.twitter.com/validator - https://dev.twitter.com/cards/types
https://developers.pinterest.com/tools/url-debugger/ - https://developers.pinterest.com/docs/rich-pins/overview/
https://developer.linkedin.com/docs/share-on-linkedin
@bisubus
bisubus / ES5-ES6-ES2017-ES2019 omit & pick
Last active April 13, 2024 21:03
ES5/ES6/ES2017/ES2019 omit & pick
@MarcoWorms
MarcoWorms / mini-redux.js
Last active June 3, 2024 04:42
Redux in a nutshell
function createStore (reducers) {
var state = reducers()
const store = {
dispatch: (action) => {
state = reducers(state, action)
},
getState: () => {
return state
}
}
import React from "react";
import ReactDOM from "react-dom";
import PropTypes from "prop-types";
document.body.style.background = `
linear-gradient(135deg,
#1e5799 0%,
#2989d8 50%,
#207cca 51%,
#7db9e8 100%

Algorithmic layouts

You are looking at the most important, and most abundant thing on the web. You can't see it, unfortunately, because it's very small… aaaaand it's invisible — so having a magnifying glass doesn't really help here. But still.

I'm talking, of course, about U+0020; not to be confused with the band U2, who are just as ubiquitous, but far less useful.

This unicode point, representing the humble space character, is between every word, in every run of text, on every page of the web. And it has a very special characteristic: it's not sticky like glue. If two words are neighbors but there's not enough room for both of them, the space will free the second word to wrap around and start a new line.

Before getting into flexible containers, viewport meta tags, and @media breakpoints this humble character is what makes the web fundamentally 'responsive'. That is: able to change the layout of its content to suit different devices, contexts, and settings. Browser text does this automa

@Jessidhia
Jessidhia / react-scheduler.md
Last active June 11, 2024 10:48
Implementation notes on react's scheduling model as of (shortly before) 16.8.0

Implementation notes on react's scheduling model as of (shortly before) 16.8.0

While the public API intended for users to use is the scheduler package, the reconciler currently does not use scheduler's priority classes internally.

ReactFiberScheduler has its own internal "mini-scheduler" that uses the scheduler package indirectly for its deadline-capable scheduleCallback.

This is kind of a documentation of implementation details that I suppose will be gone by the end of the year, but what can you do.