alamb commented on PR #7911:
URL: https://github.com/apache/arrow-rs/pull/7911#issuecomment-3070001048
I added some benchmarks and my local results suggest that avoiding the
allocations makes parsing small repeated json objects about 10% faster.
I think once we stop copying stuff around in the sub builders, the other
bencmarks will be quite a bit faster too
```
Gnuplot not found, using plotters backend
small_repeated_json 8k string
time: [5.3628 ms 5.3743 ms 5.3862 ms]
change: [−11.062% −10.867% −10.654%] (p = 0.00 <
0.05)
Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
2 (2.00%) high mild
Benchmarking small_random_json 8k string: Warming up for 3.0000 s
Warning: Unable to complete 100 samples in 5.0s. You may wish to increase
target time to 7.2s, or reduce sample count to 60.
small_random_json 8k string
time: [71.132 ms 71.245 ms 71.364 ms]
change: [−1.7432% −1.4915% −1.2496%] (p = 0.00 <
0.05)
Performance has improved.
Found 10 outliers among 100 measurements (10.00%)
9 (9.00%) high mild
1 (1.00%) high severe
```
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