Omega359 commented on issue #19754:
URL: https://github.com/apache/datafusion/issues/19754#issuecomment-3764122520
```
Running benches/to_timestamp.rs
(target/release/deps/to_timestamp-e128f26fee82d53a)
string_to_timestamp_nanos_formatted_single_format_utf8_jiff
time: [872.34 ns 881.57 ns 899.22 ns]
change: [−0.7603% +1.0589% +3.3784%] (p = 0.36 >
0.05)
No change in performance detected.
Found 6 outliers among 100 measurements (6.00%)
2 (2.00%) high mild
4 (4.00%) high severe
string_to_timestamp_nanos_formatted_multiple_formats_utf8_jiff
time: [5.7988 µs 5.8178 µs 5.8378 µs]
change: [−7.0288% −5.5738% −4.1877%] (p = 0.00 <
0.05)
Performance has improved.
Found 1 outliers among 100 measurements (1.00%)
1 (1.00%) high mild
to_timestamp_no_formats_utf8_jiff
time: [706.84 ns 709.56 ns 713.90 ns]
change: [−4.5592% −2.8557% −1.6062%] (p = 0.00 <
0.05)
Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
2 (2.00%) low severe
2 (2.00%) low mild
3 (3.00%) high mild
3 (3.00%) high severe
to_timestamp_no_formats_largeutf8_jiff
time: [644.06 ns 645.40 ns 646.87 ns]
change: [+0.0605% +0.5170% +0.9026%] (p = 0.01 <
0.05)
Change within noise threshold.
Found 8 outliers among 100 measurements (8.00%)
3 (3.00%) high mild
5 (5.00%) high severe
to_timestamp_no_formats_utf8view_jiff
time: [697.07 ns 698.54 ns 699.93 ns]
change: [−5.0574% −3.9609% −3.1563%] (p = 0.00 <
0.05)
Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
7 (7.00%) low mild
2 (2.00%) high mild
to_timestamp_with_formats_utf8_jiff
time: [6.4408 µs 6.4575 µs 6.4734 µs]
change: [−0.7557% +0.1149% +1.4695%] (p = 0.87 >
0.05)
No change in performance detected.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high severe
to_timestamp_with_formats_largeutf8_jiff
time: [6.4512 µs 6.4755 µs 6.5013 µs]
change: [−3.6728% −2.0191% −0.7716%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 4 outliers among 100 measurements (4.00%)
3 (3.00%) high mild
1 (1.00%) high severe
to_timestamp_with_formats_utf8view_jiff
time: [6.5225 µs 6.5406 µs 6.5597 µs]
change: [−3.8921% −1.1917% +0.6690%] (p = 0.41 >
0.05)
No change in performance detected.
Found 3 outliers among 100 measurements (3.00%)
1 (1.00%) high mild
2 (2.00%) high severe
string_to_timestamp_nanos_formatted_single_format_utf8_chrono
time: [1.6789 µs 1.6816 µs 1.6848 µs]
change: [−4.5192% −1.7625% +0.0273%] (p = 0.15 >
0.05)
No change in performance detected.
Found 15 outliers among 100 measurements (15.00%)
12 (12.00%) high mild
3 (3.00%) high severe
string_to_timestamp_nanos_formatted_multiple_formats_utf8_chrono
time: [2.1758 µs 2.1941 µs 2.2302 µs]
change: [−1.1375% −0.5902% +0.2361%] (p = 0.09 >
0.05)
No change in performance detected.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high severe
to_timestamp_no_formats_utf8_chrono
time: [860.83 ns 861.99 ns 863.20 ns]
change: [+0.6651% +0.9179% +1.1764%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 2 outliers among 100 measurements (2.00%)
1 (1.00%) high mild
1 (1.00%) high severe
to_timestamp_no_formats_largeutf8_chrono
time: [805.05 ns 805.66 ns 806.34 ns]
change: [−7.2011% −6.9420% −6.6913%] (p = 0.00 <
0.05)
Performance has improved.
to_timestamp_no_formats_utf8view_chrono
time: [854.30 ns 855.05 ns 855.92 ns]
change: [−0.1106% +0.2040% +0.5063%] (p = 0.20 >
0.05)
No change in performance detected.
Found 3 outliers among 100 measurements (3.00%)
2 (2.00%) high mild
1 (1.00%) high severe
to_timestamp_with_formats_utf8_chrono
time: [2.8956 µs 2.9014 µs 2.9088 µs]
change: [−2.0427% −1.1349% −0.0821%] (p = 0.01 <
0.05)
Change within noise threshold.
Found 5 outliers among 100 measurements (5.00%)
5 (5.00%) high severe
to_timestamp_with_formats_largeutf8_chrono
time: [2.9810 µs 2.9891 µs 2.9980 µs]
change: [−1.3328% −0.3801% +0.3788%] (p = 0.43 >
0.05)
No change in performance detected.
Found 3 outliers among 100 measurements (3.00%)
1 (1.00%) low mild
2 (2.00%) high mild
to_timestamp_with_formats_utf8view_chrono
time: [2.9523 µs 2.9588 µs 2.9657 µs]
change: [+0.7534% +1.6558% +2.4373%] (p = 0.00 <
0.05)
Change within noise threshold.
Found 3 outliers among 100 measurements (3.00%)
3 (3.00%) high severe
```
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