Experiment v1/chat

[glenn-jocher]

Summary

Keeps the v1 chat backend experiment open for side-by-side performance profiling without merging it into main.

• Changes the widget default from the legacy Cloud Run endpoint to https://ul.run/chat/v1/chat on this branch.
• Adds a 30-question browser benchmark comparing the legacy and v1 endpoints.
• Measures time to first SSE event (TTFE), with mean, standard deviation, min/max, sample count, and errors.
• Interleaves the endpoints and alternates which runs first to reduce load and time-order bias.

The benchmark must run from an origin allowed by both backends (such as the deployed llm demo).

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Project	Deployment	Actions	Updated (UTC)
llm	Ready	Preview, Comment	Jul 10, 2026 9:42pm

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🔍 PR Review

_{Made with ❤️ by Ultralytics Actions}

Clean PR. The default apiUrl update in js/chat.js and corresponding js/chat.min.js change are consistent and should not affect existing integrations that override apiUrl. No issues found in the changed lines.

📋 Skipped 1 file (lock files, minified, images, etc.)

• js/chat.min.js

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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