duongcongtoai commented on issue #17446:
URL: https://github.com/apache/datafusion/issues/17446#issuecomment-3504689479
```
toai@salamancabrothehood:~/proj/rust/playpy$ bash test.sh sample-1m.parquet
Benchmark 1: uv run polar.py sample-1m.parquet
Time (mean ± σ): 867.0 ms ± 28.5 ms [User: 2599.8 ms, System:
800.0 ms]
Range (min … max): 835.4 ms … 916.0 ms 10 runs
Benchmark 2: uv run df.py sample-1m.parquet
Time (mean ± σ): 1.445 s ± 0.020 s [User: 4.682 s, System: 0.537
s]
Range (min … max): 1.400 s … 1.472 s 10 runs
Summary
uv run polar.py sample-1m.parquet ran
1.67 ± 0.06 times faster than uv run df.py sample-1m.parquet
```
I apply a patch in arrow-rs to fix Dictionary error and here is the
performance improvement
<img width="1741" height="766" alt="Image"
src="https://github.com/user-attachments/assets/2f0d2541-1173-4a1b-86fe-06ef2245c1b0";
/>
ArrayAgg ran within the first 600-700ms, the rest is the time for writing
Parquet file, which is another point for improvement.
With this result, i think this PR is good to push for review:
https://github.com/apache/arrow-rs/pull/8652
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