GW2 Gear Optimizer

TL;DR

The Gear Optimizer helps Guild Wars 2 players find optimal builds for fractals, raids, and strike missions.

Demo / live site: https://optimizer.discretize.eu
Code: Github

I made signifcant contributions to the frontend as well as to the calculation core by rewriting it in Rust and implementing threading. Furthermore, I worked closely with and coordinated a small team of a few developers from all over the world (see here ) to improve the project further.

Description

Interesting features for players of the video game:

find optimal builds based on various parameters
build templates with extensive sensible defaults that are used by players
support for different game modes with different balancing
Uptime input for conditional buffs
keyboard shortcuts
custom arbitrary modifier input to allow simulating theoretical balancing
infusion helper: calculates the cheapest way to acquire n agony resistance
input condition distribution
displays the results just like in game
share settings and results with a single link

Most Significant Contributions

I rewrote the frontend from scratch utilizing modern JS tooling
-> the old optimizer consisted out of one 10k LoC HTML file and an equally large js file; bundled with gulp and jquery …
ported the calculation core to Rust; refactored the combination generation code to support multi-threading
-> added some heuristics to reduce the amount of combinations
state compression algorithm based on a schema so that players can share links to their builds without a server storing data

Technical Details

The optimizer has numerous interesting technical features:

React SPA without SSR with Vite
Built with Material-UI 5 and Emotion for CSS-in-JS
Statemanagement with ReduxJS
multithreaded calculations with Rust compiled to WASM and WebWorkers
i18n localization (Chinese and German)
hosted on Cloudflare pages utilizing Workers and KV
custom algorithm for lossless state compress based on a schema into base64, url-save strings