Add ravif integration with multithreading

Description

This issue does not include a description.

Contributor guide

Tech stack

typescript

Domain

frontendperformance

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

4

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

over 1 week

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

mostly clear

Prerequisites

TypeScriptWeb WorkersAVIF codec basicsSquoosh codebase structure

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

25

Research direction

Start by examining existing codec integrations in squoosh, such as cwebp or mozjpeg, to understand the pattern for adding a new codec. Look at the worker files and how they handle multithreading. Check the issue comments for any additional context or requirements. Then implement a new worker for ravif (AVIF) that utilizes multithreading to improve performance.