feat: Add benchmark for buf write

[Xuanwo]

at_least_buf_write/4.00 KiB
                        time:   [149.96 ns 150.10 ns 150.25 ns]
                        thrpt:  [25.388 GiB/s 25.415 GiB/s 25.438 GiB/s]
at_least_buf_write/256 KiB
                        time:   [127.08 ns 127.17 ns 127.28 ns]
                        thrpt:  [1918.2 GiB/s 1919.8 GiB/s 1921.2 GiB/s]
at_least_buf_write/4.00 MiB
                        time:   [124.63 ns 125.06 ns 125.72 ns]
                        thrpt:  [ 31072 GiB/s  31234 GiB/s  31342 GiB/s]
at_least_buf_write/16.0 MiB
                        time:   [125.82 ns 126.05 ns 126.34 ns]
                        thrpt:  [123677 GiB/s 123955 GiB/s 124186 GiB/s]

exact_buf_write/4.00 KiB
                        time:   [245.48 ns 245.68 ns 245.88 ns]
                        thrpt:  [15.515 GiB/s 15.527 GiB/s 15.540 GiB/s]
exact_buf_write/256 KiB time:   [215.33 ns 215.43 ns 215.53 ns]
                        thrpt:  [1132.7 GiB/s 1133.3 GiB/s 1133.8 GiB/s]
exact_buf_write/4.00 MiB
                        time:   [1.6147 µs 1.6155 µs 1.6163 µs]
                        thrpt:  [2416.8 GiB/s 2418.0 GiB/s 2419.2 GiB/s]
exact_buf_write/16.0 MiB
                        time:   [5.9971 µs 6.0011 µs 6.0048 µs]
                        thrpt:  [2602.1 GiB/s 2603.7 GiB/s 2605.4 GiB/s]

exact_buf_write is slower than at_least_buf_write which is expected since we need to make sure all write operation has been aligned with buffer size. Although I'm sure that there are many areas for improvement.

[suyanhanx]

Thanks

[suyanhanx]

Is there any result?

[Xuanwo]

Is there any result?

updated.

[dqhl76]

Do we need add a README under benches/oio or combine it with benches/ops?

[Xuanwo]

Do we need add a README under benches/oio or combine it with benches/ops?

I'm guessing read benches/README.md is enough. But It's Ok to improve them if you are intereted.

[dqhl76]

Do we need add a README under benches/oio or combine it with benches/ops?

I'm guessing read benches/README.md is enough.

Ok.

[dqhl76]

Thanks!