HaoYang670 commented on issue #1400:
URL: https://github.com/apache/arrow-rs/issues/1400#issuecomment-1059886865
Also, using `copy` or `reference` seems to impact the performance of null
handling loop. I get the following benchmark result:
1. using `m.iter().copied().reduce(...)`:
```console
min nulls 512 time: [866.42 ns 867.35 ns 868.33 ns]
change: [-1.1100% -0.9494% -0.8086%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 9 outliers among 100 measurements (9.00%)
7 (7.00%) high mild
2 (2.00%) high severe
```
3. using `m.iter().reduce(...).copied()`
```console
min nulls 512 time: [1.0525 us 1.0551 us 1.0576 us]
change: [+20.470% +20.793% +21.115%] (p = 0.00 <
0.05)
Performance has regressed.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high mild
```
Can you reproduce these weird results on your laptop? @jhorstmann
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
