XiangpengHao commented on issue #13818:
URL: https://github.com/apache/datafusion/issues/13818#issuecomment-2725268714

   > Hi [@XiangpengHao](https://github.com/XiangpengHao) and 
[@waynexia](https://github.com/waynexia) is there a way to make the a website 
like in [parquet-viewer](https://parquet-viewer.xiangpeng.systems/) without 
reading the whole file from s3 like you implemented into the memory or are you 
saving it into filesystem? because as far as I know its not possible to read 
and write to filesystem in wasm as of yet?
   
   Parquet viewer does not read the whole file; it only reads the metadata and 
data relevant to your query.
   
   Try this example: 
https://parquet-viewer.xiangpeng.systems/?url=https%3A%2F%2Fhuggingface.co%2Fdatasets%2FHuggingFaceFW%2Ffineweb%2Fresolve%2Fmain%2Fdata%2FCC-MAIN-2014-42%2F000_00005.parquet
   
   You almost instantly get the query results even if the parquet file is a few 
GBs large.


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