[Bug]: 100% cpu usage and stuck

[Qwenjin]

Describe the bug

Open any code snippet. Occasionally, I get stuck and find that the cpu usage is 100%.
It will return to normal after some time.

relate to: #287

To reproduce

1. Create some random data to make the db.json file larger than 100kb.
2. Open some code snippets with more content.

Version

3.11.0

OS

macOS 12.7.2

Validations

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