Very long initial loading time when running exported HTML on a local server

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### Search first

- [x] I searched and no similar issues were found

### What Happened?

After exporting my graph to HTML and running it through a local server, the initial loading time is very long.

I am not sure whether this is caused by the relatively low specifications of the computer running the exported HTML, so I cannot determine whether the loading time is expected behavior.

### Reproduce the Bug

1. Export the graph to HTML.
2. Run the exported HTML files using a local server.
3. Open the exported page in a web browser.
4. Observe the initial loading time.

### Expected Behavior

The exported HTML should load within a reasonable amount of time, if possible.

### Screenshots

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### Files

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### Browser, Desktop or Mobile Platform Information

windows 10
cpu: i3 9100F
ram: 16gb

logseq 2.0.1 export
db.sqlite filesize: 7.73mb

browser: chrome

### Additional Context

_No response_

### Are you willing to submit a PR? If you know how to fix the bug.

- [ ] I'm willing to submit a PR (Thank you!)

Reproduce the export flow using the reported Windows 10, Chrome, and 7.73 MB db.sqlite context: export the graph, serve the exported HTML files locally, and measure the initial load. Investigate which part of the exported page or database processing accounts for the delay; done means identifying the bottleneck and confirming that the exported page loads within a reasonable time.

Written by the indexing model from the issue text.