Connection performance improvements

[sebastienros]

• Regression in connections creation performance runtime#61233

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 7 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

[sebastienros]

After runtime#61233

| application           | net6.0  | net7.0                    |          |
| --------------------- | ------- | ------------------------- | -------- |
| CPU Usage (%)         |       8 |                        33 | +312.50% |
| Cores usage (%)       |      97 |                       399 | +311.34% |
| Working Set (MB)      |     132 |                       131 |   -0.76% |
| Private Memory (MB)   |     156 |                       154 |   -1.28% |
| Build Time (ms)       |   1,422 |                     1,601 |  +12.59% |
| Start Time (ms)       |     505 |                       506 |   +0.20% |
| Published Size (KB)   |  91,392 |                    91,372 |   -0.02% |
| .NET Core SDK Version | 6.0.102 | 7.0.100-preview.2.22108.9 |          |


| load                   | net6.0 | net7.0  |          |
| ---------------------- | ------ | ------- | -------- |
| CPU Usage (%)          |     16 |      23 |  +43.75% |
| Cores usage (%)        |    190 |     271 |  +42.63% |
| Working Set (MB)       |     38 |      38 |    0.00% |
| Private Memory (MB)    |    357 |     357 |    0.00% |
| Start Time (ms)        |      0 |       1 |      +∞% |
| First Request (ms)     |     85 |      87 |   +2.35% |
| Requests/sec           | 11,753 |  27,213 | +131.54% |
| Requests               | 94,712 | 219,293 | +131.54% |
| Mean latency (ms)      |   4.27 |    1.09 |  -74.47% |
| Max latency (ms)       |  40.51 |   15.77 |  -61.07% |
| Bad responses          |      0 |       0 |          |
| Socket errors          |      0 |       0 |          |
| Read throughput (MB/s) |   1.59 |    3.69 | +132.08% |
| Latency 50th (ms)      |   1.00 |    1.05 |   +5.00% |
| Latency 75th (ms)      |   6.88 |    1.09 |  -84.16% |
| Latency 90th (ms)      |  11.90 |    1.13 |  -90.50% |
| Latency 99th (ms)      |  22.58 |    2.26 |  -89.99% |

[adityamandaleeka]

Closing since the work identified here has been fixed in 7.0. Let's open other issues if we find more we can do in this space.