[GitHub] [arrow] kylebarron commented on pull request #35780: GH-15060: [JS] Add LargeUtf8 type

["kylebarron (via GitHub)" <gi...@apache.org>]

kylebarron commented on PR #35780:
URL: https://github.com/apache/arrow/pull/35780#issuecomment-1729790334

   I was talking with @trxcllnt about this a couple weeks ago. One use case for the `LargeUtf8` type is to support zero-copy operations with webassembly, which is separate from the use case of actually handling string buffers beyond 2^32. In https://github.com/kylebarron/arrow-js-ffi I currently support large types in by asserting (well right now assuming) that the values buffer is smaller than 2^32 and copying/downcasting the offsets into an `Int32Array` array, but it would be _nice_ if that would work without having to downcast


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