GraphQL events page uses massive CPU?

### Description

I went to [the GraphQL events page](https://graphql.org/community/events/), and although it doesn't seem to be doing anything (no visible changes), the fans on my PC span up and it seems to have pegged 16 of my cores to 60+% CPU each. The same does not happen on the graphql.org home page, it seems specific to the events page.

### Steps to Reproduce

1. Visit https://graphql.org/community/events in Firefox 147.0.2 under Ubuntu 25.10 running in a virt-manager virtual machine

### Expected Result

Normal static web page uses almost no CPU.

### Actual Result

Webpage consumes vast CPU:

### Additional Context

The VM likely does not have graphics acceleration, so maybe it's a WebGL thing? Even so, nothing seems to be changing on the page, so I'm not sure why this would happen.

まず、グラフィックスアクセラレーションなしの virt-manager VM 上の Ubuntu 25.10 で、Firefox 147.0.2 を使って https://graphql.org/community/events を再現し、その後、graphql.org のホームページと動作を比較します。イベントページを調査して、持続的な CPU 使用率の原因を特定してください。ページが機能を維持したまま過剰な CPU を消費しなくなれば完了です。

索引モデルが issue の本文から書いたものです。