lidavidm commented on pull request #11189:
URL: https://github.com/apache/arrow/pull/11189#issuecomment-923201576
Though for what it's worth, arrowbench gives rather similar results locally
using `as.data.frame(run_benchmark(dataset_taxi_parquet, n_iter=5,
cpu_count=c(4)))`.
Before:
```
Total run time: 9.956319 secs
iteration process real start_mem_bytes end_mem_bytes
1 1 2.979338342 0.785497665 2493300736 3698921472
2 2 2.886093707 0.766516447 3699429376 3714109440
3 3 2.920944454 0.776514053 3714109440 3714109440
4 4 2.877046089 0.766922712 3714109440 3714109440
5 5 2.896827784 0.770490646 3714109440 3714109440
6 1 18.316171634 4.632888794 2493300736 3777204224
7 2 17.657202597 4.614435434 3731472384 3815968768
8 3 17.561911295 4.556154490 3744194560 3779891200
9 4 17.775040099 4.648452759 3744194560 3815968768
10 5 17.586604237 4.563611269 3744194560 3779891200
11 1 0.964031791 0.582021236 2493296640 3450097664
12 2 0.771914299 0.414866209 3342176256 3463372800
13 3 0.770634774 0.410928965 3347357696 3527225344
14 4 0.798272907 0.439264059 3352600576 3523477504
15 5 0.795549228 0.436603546 3357843456 3523641344
16 1 0.488568257 0.068626642 2493296640 3346874368
17 2 0.001445519 0.001448631 3346874368 3346874368
18 3 0.001467639 0.001470804 3346874368 3346874368
19 4 0.001425503 0.001428366 3346874368 3346874368
20 5 0.001460951 0.001464367 3346874368 3346874368
max_mem_bytes gc_level0 gc_level1 gc_level2 query cpu_count
1 3720196096 1 0 0 vignette 4
2 3720196096 0 0 0 vignette 4
3 3720196096 0 0 0 vignette 4
4 3720196096 0 0 0 vignette 4
5 3720196096 0 0 0 vignette 4
6 3796340736 2 0 1 payment_type_3 4
7 3815968768 1 0 1 payment_type_3 4
8 3815968768 1 0 0 payment_type_3 4
9 3815968768 0 0 1 payment_type_3 4
10 3815968768 1 0 0 payment_type_3 4
11 3481989120 2 1 3 small_no_files 4
12 3513794560 2 0 1 small_no_files 4
13 3527225344 1 0 1 small_no_files 4
14 3527225344 2 0 1 small_no_files 4
15 3527225344 0 1 1 small_no_files 4
16 3346874368 0 0 0 count_rows 4
17 3346874368 0 0 0 count_rows 4
18 3346874368 0 0 0 count_rows 4
19 3346874368 0 0 0 count_rows 4
20 3346874368 0 0 0 count_rows 4
```
After:
```
Total run time: 9.995613 secs
iteration process real start_mem_bytes end_mem_bytes
1 1 3.097148086 0.810223818 2493313024 3759751168
2 2 2.987976486 0.778924227 3760332800 3779207168
3 3 2.969162397 0.776125669 3779207168 3779207168
4 4 2.969802084 0.777535439 3779207168 3779207168
5 5 2.967313487 0.775563955 3779207168 3779207168
6 1 18.042212503 4.552006245 2493313024 3805003776
7 2 17.391559404 4.544502735 3759271936 3832758272
8 3 17.281636477 4.486674547 3760984064 3796680704
9 4 17.363466488 4.545516968 3760984064 3832758272
10 5 17.310964707 4.487994194 3760984064 3796680704
11 1 1.036147931 0.602855206 2493313024 3547631616
12 2 0.797990419 0.419062376 3439710208 3601801216
13 3 0.793205374 0.414812803 3485786112 3683479552
14 4 0.801588050 0.428945065 3508854784 3674488832
15 5 0.834174869 0.443217278 3508854784 3674656768
16 1 0.500276311 0.069972277 2493321216 3346898944
17 2 0.001478722 0.001481056 3346898944 3346898944
18 3 0.001478401 0.001481295 3346898944 3346898944
19 4 0.001472831 0.001475811 3346898944 3346898944
20 5 0.001461316 0.001464128 3346898944 3346898944
max_mem_bytes gc_level0 gc_level1 gc_level2 query cpu_count
1 3759751168 1 0 0 vignette 4
2 3779207168 0 0 0 vignette 4
3 3779207168 0 0 0 vignette 4
4 3779207168 0 0 0 vignette 4
5 3779207168 0 0 0 vignette 4
6 3824140288 2 0 1 payment_type_3 4
7 3832758272 1 0 1 payment_type_3 4
8 3832758272 1 0 0 payment_type_3 4
9 3832758272 0 0 1 payment_type_3 4
10 3832758272 1 0 0 payment_type_3 4
11 3579523072 2 1 3 small_no_files 4
12 3652222976 2 0 1 small_no_files 4
13 3683479552 1 0 1 small_no_files 4
14 3683479552 2 0 1 small_no_files 4
15 3683479552 0 1 1 small_no_files 4
16 3414007808 0 0 0 count_rows 4
17 3414007808 0 0 0 count_rows 4
18 3414007808 0 0 0 count_rows 4
19 3414007808 0 0 0 count_rows 4
20 3414007808 0 0 0 count_rows 4
```
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