Re: [w3c/IndexedDB] Feature Request: Allow batch adding records (from an Array) (#69)

shadow-identity left a comment (w3c/IndexedDB#69)

Performance of Chrome and Firefox decreases significantly when using a combined index:
```js
store.createIndex('abc', ['keyA', 'keyB', 'keyC'])
```
Adding 1 million simple, non-nested records _(waiting for the transaction to close) on Apple M3 takes about **1 minute** on Chrome and **two minutes** on Firefox. 

I believe with optimized bulk addition, this could be significantly faster.

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