Benchmarks that compare copying data between two Vec<u8>s using
std::slice::copy_from_slice and a loop that copies one byte at a time.
Run the benchmark with cargo bench.
Compiled with rustc 1.60.0-nightly (498eeb72f 2022-01-31).
Run on Intel i7-7500U (2.70 GHz) with Ubuntu 21.04.
copy/16KiB_stdlib time: [2.0702 us 2.0888 us 2.1052 us]
Found 13 outliers among 100 measurements (13.00%)
13 (13.00%) low mild
copy/16KiB_manual time: [1.9551 us 1.9761 us 1.9939 us]
Found 6 outliers among 100 measurements (6.00%)
6 (6.00%) low mild
copy/128KiB_stdlib time: [17.378 us 20.227 us 23.406 us]
Found 30 outliers among 100 measurements (30.00%)
14 (14.00%) low mild
2 (2.00%) high mild
14 (14.00%) high severe
copy/128KiB_manual time: [13.238 us 13.361 us 13.463 us]
Found 11 outliers among 100 measurements (11.00%)
11 (11.00%) low mild
copy/1MiB_stdlib time: [422.28 us 422.97 us 423.78 us]
Found 29 outliers among 100 measurements (29.00%)
15 (15.00%) low severe
5 (5.00%) low mild
3 (3.00%) high mild
6 (6.00%) high severe
copy/1MiB_manual time: [359.13 us 359.54 us 360.00 us]
Found 23 outliers among 100 measurements (23.00%)
14 (14.00%) low severe
5 (5.00%) low mild
2 (2.00%) high mild
2 (2.00%) high severe
copy/16MiB_stdlib time: [7.6757 ms 7.6886 ms 7.7045 ms]
Found 11 outliers among 100 measurements (11.00%)
2 (2.00%) high mild
9 (9.00%) high severe
copy/16MiB_manual time: [6.3536 ms 6.3821 ms 6.4262 ms]
Found 11 outliers among 100 measurements (11.00%)
5 (5.00%) high mild
6 (6.00%) high severe