jorgecarleitao opened a new pull request #9077:
URL: https://github.com/apache/arrow/pull/9077
This is a corollary of the new API PRed in #9076 , and how we can use it to
efficiently build `Buffer` without even using the `MutableBuffer`. The main
idea here is that we can write
```
let lengths: Buffer = slice
.windows(2)
.map(|offset| offset[1] - offset[0])
.collect();
```
and this (efficiently) builds a `Buffer` from the offset differences.
Bench:
```
length time: [3.2345 us 3.2457 us 3.2602 us]
change: [-12.072% -11.361% -10.654%] (p = 0.00 <
0.05)
Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
4 (4.00%) high mild
6 (6.00%) high severe
```
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