Proxy has cloud scale performance, and is benchmarked in the lab

[samsp-msft]

Ongoing effort to analyze perf of the proxy.

• Add micro benchmarks Add microbenchmarks #223
• Add more benchmark scenarios Add more benchmark scenarios #222
• Poor performance and errors when proxying https Poor performance and errors when proxying to https #355
• Profile Memory Capture memory profile and eliminate unnecessary allocations #221
• Do not flow the Connection header? Do not flow the Connection header? #439

[samkho]

Please add any result to the README.md. Thanks.

[karelz]

Triage: Most work is done, more things are ongoing. No need to track them now for 1.0.