zebsme commented on issue #15321:
URL: https://github.com/apache/datafusion/issues/15321#issuecomment-2785774470
Thanks for your reply @2010YOUY01 , and the benchmark shows that
StreamReader with mmap has no performance improvement compared to current
implementation:
```
spill_io/StreamReader/read_100/
time: [7.1020 ms 7.2847 ms 7.4983 ms]
change: [-2.7305% +1.2574% +5.1899%] (p = 0.55 >
0.05)
No change in performance detected.
```
So there is no need to enable mmap now, as we need stream format here.
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