Use `JSON.parse` to load `searchData`

[dragomirtitian]

Search terms

JSON.parse, load, search, performance, searchData

Expected Behavior

TypeDoc loads search index before the user has a chance to start typing in the search bar

Actual Behavior

For large indexes (we have a 17MB one) loading the index takes up to 6-7s. Most of this time is spent in parsing and loading the object literal.

Suggestion

Use JSON.parse("<index data>") instead to load the index. JSON parsing is much faster than JS parsing as the grammar is simpler, and when the index is large the difference is quite big.

Steps to reproduce the bug

It's hard to reproduce this without actually sharing our existing index. If needed I can create a dummy repository

Environment

• Typedoc version: 0.21.6
• TypeScript version: 4.3.5
• Node.js version: 14
• OS: Windows 10

[Gerrit0]

Sounds reasonable to me 👍