There are a few ways to reuse information across service worker restarts in JavaScript:

1. IndexedDB: You can use IndexedDB to store data locally on the client side, which can be retrieved by the service worker after it has been restarted. This allows you to keep track of user preferences or other important data that needs to persist across restarts.

2. Cache API: The Cache API allows you to cache resources such as images and scripts on the client side, so that they can be accessed more quickly in subsequent requests. This can help improve the performance of your service worker, especially if it is handling a lot of requests.

3. ServiceWorkerGlobalScope.registration.addEventListener(): You can add an event listener to the service worker's global scope, which will fire whenever the service worker is restarted. This allows you to perform any necessary initialization tasks or update any state that needs to be restored.

4. Shared Workers: If your service worker needs to communicate with other workers on the same domain, you can use shared workers to share data and resources across different instances of the service worker. This can help improve performance and reduce memory usage.