Bug: Site performance score is below expected value on Lighthouse audit

[MikVito]

Summary

When analyzing the performance of the Codebattle site by Lighthouse, the performance score is reported as 76, which is below the expected threshold for production-grade responsiveness. This might negatively impact the user experience, especially for users with slower connections or devices.

Reproduction steps

1. Go to https://codebattle.hexlet.io/games/242184
2. Open DevTools (F12)
3. Go to the Lighthouse tab
4. Generate a performance report for a desktop device
5. Observe the performance score

Expected result

The performance score should be in the green zone (90–100), indicating optimal page speed and responsiveness.

Actual result

The performance score is only 76.
Key metrics from Lighthouse:

• Largest Contentful Paint: 2.9s
• Speed Index: 2.5s
• Total Blocking Time: 110ms

Browsers

Chrome

OS

Windows

[vtm9]

Relabeling as enhancement-proposal: this is performance-optimization work (client-rendered SPA with a Monaco-heavy game page — LCP 2.9s / TBT 110ms), not a functional defect. Same class as #2249; improving toward 90+ means bundle splitting, deferring the editor, preloading, and asset tuning.