Matthias Einwag 312c0f041c Perf: Use owned buffers ...

Use zero-copy APIs when sending data in perf application.

Performance difference:
1. First line is before
2. Second line is after (but with only the download write change)

```
      │ Duration  │ FBL       | Upload Throughput | Download Throughput
──────┼───────────┼───────────┼───────────────────┼────────────────────
 AVG  │    5.00ms │    1.00ms │      332.82 MiB/s │        334.20 MiB/s
 AVG  │    5.00ms │    0.00ns │      332.64 MiB/s │        335.96 MiB/s
```

=> Makes less than 1%. Still neat to have

2021-03-02 09:13:00 +01:00

..

src

Perf: Use owned buffers

2021-03-02 09:13:00 +01:00

Cargo.toml

Aggregate perf stats and print them

2021-03-02 07:01:16 +01:00