Connection performance improvements

[sebastienros]

• Regression in connections creation performance runtime#61233

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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.
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[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.