pepijnve commented on PR #16398:
URL: https://github.com/apache/datafusion/pull/16398#issuecomment-2989086637
@alamb @Dandandan I'm starting to get the feeling this is a wild goose
chase. I adapted `bench.sh` a bit so that I can pass in `--query`. I then ran
`clickbench_1` query 4 multiple times since that showed a particularly large
slowdown in your run. Here's what I got. Depending on the whims of the
benchmark gods the runs are sometimes faster, sometimes slower.
I'm not sure if you can make any meaningful conclusion based on these
timings alone. I'll try to have a look at performance counters next, maybe that
paints a clearer picture.
```
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Query ┃ baseline ┃
branch ┃ Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ QQuery 4 │ 408.42 / 416.77 ±10.99 / 437.63 ms │ 427.32 / 453.68 ±23.80
/ 496.62 ms │ slower │
│ QQuery 4 │ 412.03 / 420.43 ±9.88 / 439.50 ms │ 413.27 / 426.28 ±8.92
/ 437.55 ms │ no change │
│ QQuery 4 │ 416.20 / 426.53 ±5.67 / 432.79 ms │ 426.05 / 431.55 ±7.22
/ 444.22 ms │ no change │
│ QQuery 4 │ 409.48 / 417.30 ±8.24 / 431.85 ms │ 406.66 / 419.13 ±11.66
/ 438.14 ms │ no change │
│ QQuery 4 │ 407.35 / 421.29 ±10.34 / 436.56 ms │ 418.82 / 433.02 ±14.18
/ 458.39 ms │ no change │
│ QQuery 4 │ 409.18 / 421.46 ±9.34 / 437.74 ms │ 409.45 / 418.36 ±10.57
/ 438.11 ms │ no change │
│ QQuery 4 │ 407.54 / 418.17 ±9.50 / 435.26 ms │ 413.72 / 423.48 ±7.94
/ 434.72 ms │ no change │
│ QQuery 4 │ 406.85 / 417.14 ±10.05 / 436.24 ms │ 406.06 / 416.47 ±8.68
/ 428.46 ms │ no change │
│ QQuery 4 │ 405.30 / 416.89 ±13.20 / 441.77 ms │ 405.34 / 415.79 ±12.40
/ 439.34 ms │ no change │
└──────────────┴────────────────────────────────────┴────────────────────────────────────┴───────────┘
```
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