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…xy racing The URL loader was extremely slow and unreliable for external CSV deep links because fetches had no timeout (hanging forever on unresponsive proxies), proxies were tried sequentially, and 3 retry cycles with 1.5s delays added unnecessary wait time. Changes: - Add 8s timeout per fetch via AbortController (no more infinite hangs) - Race CORS proxies concurrently with Promise.any (fastest wins) - Reduce retries from 3 to 2 and delay from 1.5s to 0.5s - Properly throw on non-OK HTTP status instead of silently falling through - Add AbortSignal support so retries/reloads cancel in-flight requests - Prevent race conditions when user clicks Retry during an active load Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Promise.anyinstead of trying them sequentially — fastest response winsContext
Deep links like
?url=https://eddycfd.uber.space/misc/DesignExplorer_SelectedResults.csv(38KB) were taking forever to load and only worked after ~10 reloads. Root cause: each fetch had no timeout, proxies were tried one-by-one, and 3 retry cycles with 1.5s delays compounded the issue.Test plan
npm run check— 0 errorsnpm test— 40/40 passnpm run build— clean?url=https://eddycfd.uber.space/misc/DesignExplorer_SelectedResults.csv🤖 Generated with Claude Code