hyriph

FFlate is the fastest, smallest, and most effective JavaScript compressor/decompressor currently; to create it, I used a variety of modified or optimized algorithms.

Part 1: The DEFLATE spec

The core of most popular compressed file formats is DEFLATE, or RFC1951. GZIP data, Zlib data, .zip files, PNG images, and more all use some variant of DEFLATE under the hood. At its core, the DEFLATE format is actually not too complex: it's merely a combination of Huffman coding and LZ77 compression.

If you don't understand either of these concepts, feel free to read the following subsections, or skip to Part 2 if you already know what these are and just want to get to implementation details.

Section I: Huffman Coding

Computers think of basically everything as numbers. The smallest unit of information in a computer is a single bit, which can only be either a 0 or a 1. When multiple bits are stringed together, they can be interpreted as a ba

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

Stuff I wish I'd known sooner about service workers

I recently had several days of extremely frustrating experiences with service workers. Here are a few things I've since learned which would have made my life much easier but which isn't particularly obvious from most of the blog posts and videos I've seen.

I'll add to this list over time – suggested additions welcome in the comments or via twitter.com/rich_harris.

Use Canary for development instead of Chrome stable

~~Chrome 51 has some pretty wild behaviour related to console.log in service workers. Canary doesn't, and it has a load of really good service worker related stuff in devtools.~~

	/* Figma squircle G2 path — smoothing=0.6, bezier→arc→bezier per corner
	* p=1.6r, coefficients: 1.04r, 0.76r, 0.546r, 0.109r (from Figma blog) */
	@utility rounded {
	--r: var(--radius-md);
	@apply border-shape-squircle;
	}
	@utility rounded-* {
	--r: --value(--radius-, [length], []);
	@apply border-shape-squircle;
	}

	You are ChatGPT, a large language model based on the GPT-5 model and trained by OpenAI.
	Knowledge cutoff: 2024-06
	Current date: 2025-08-08

	Image input capabilities: Enabled
	Personality: v2
	Do not reproduce song lyrics or any other copyrighted material, even if asked.
	You're an insightful, encouraging assistant who combines meticulous clarity with genuine enthusiasm and gentle humor.
	Supportive thoroughness: Patiently explain complex topics clearly and comprehensively.
	Lighthearted interactions: Maintain friendly tone with subtle humor and warmth.

	// Claude Code is a Beta product per Anthropic's Commercial Terms of Service.
	// By using Claude Code, you agree that all code acceptance or rejection decisions you make,
	// and the associated conversations in context, constitute Feedback under Anthropic's Commercial Terms,
	// and may be used to improve Anthropic's products, including training models.
	// You are responsible for reviewing any code suggestions before use.

	// (c) Anthropic PBC. All rights reserved. Use is subject to Anthropic's Commercial Terms of Service (https://www.anthropic.com/legal/commercial-terms).

	// Version: 0.2.9

	import { Canvas, Circle, Group, Rect, Shader, Skia, useClock, RuntimeShader, SkRuntimeEffect, RoundedRect } from "@shopify/react-native-skia";
	import { SafeAreaView, StyleSheet } from "react-native";
	import { useDerivedValue, useSharedValue } from "react-native-reanimated";
	import { Gesture, GestureDetector, GestureHandlerRootView } from 'react-native-gesture-handler';

	const styles = StyleSheet.create({
	centered: {
	flex: 1,
	alignItems: 'center',
	justifyContent: 'center',

	from manim import *

	from PIL import Image, ImageOps
	from PIL import GifImagePlugin
	from manim.utils.color import WHITE
	GifImagePlugin.LOADING_STRATEGY = GifImagePlugin.LoadingStrategy.RGB_ALWAYS

	from dataclasses import dataclass
	@dataclass
	class GifStatus:

	{url:'stun:stun01.sipphone.com'},
	{url:'stun:stun.ekiga.net'},
	{url:'stun:stun.fwdnet.net'},
	{url:'stun:stun.ideasip.com'},
	{url:'stun:stun.iptel.org'},
	{url:'stun:stun.rixtelecom.se'},
	{url:'stun:stun.schlund.de'},
	{url:'stun:stun.l.google.com:19302'},
	{url:'stun:stun1.l.google.com:19302'},
	{url:'stun:stun2.l.google.com:19302'},