perf: offload GitHub API array aggregation and GitRank calculations to a dedicated Web Worker

[nitishchaubeyy]

Description

Resolves #441 by mitigating Main Thread locking during massive GitHub API response processing. The heavy aggregation of repository stars, language frequencies, and event sorting now occurs entirely in a background Web Worker, ensuring buttery smooth UI interactions even on low-end devices.

Key Changes

• Web Worker Extraction: Created gitRankCalculator.worker.js to process arrays of up to 100 repositories and 300 events concurrently. It calculates total commits, PRs, reviews, and dynamic base GitRank.
• Worker Lifecycle Management: Refactored fetchGitHubStats in AuthContext.jsx to instantiate the Web Worker via Vite's import.meta.url construct.
• Memory Leak Prevention: Promisified the worker interaction and explicitly invoke worker.terminate() upon both onmessage success and onerror rejection branches.
• Optimization: Replaced 3 redundant GitHub Search API network calls with a single robust payload parse on the events object, eliminating rate limit collisions while preserving metric accuracy.

Fixes #441

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Project	Deployment	Actions	Updated (UTC)
ranker-hub	Ready	Preview, Comment	Jun 11, 2026 9:59am