How about caching split_detail.json in localStorage?

Compressed should work for search: streaming decompress, split into lines, match.

I thought about weekly html files or uploading quarterly csv files to Google drive, but I'd rather not share with Google.

I've been doing pandas lately, which made me wonder about JS dataframe apis... This ine looks cool...

https://github.com/data-forge/data-forge-ts/blob/master/docs/guide.md#browser-installation-and-setup

But ordinary map / filter should work for this.