* add performance section
* review feedback
* add service invocation link
* Update perf-service-invocation.md
* updated numbers
* Update perf-service-invocation.md
* Update perf-service-invocation.md
* add HA numbers
* link to perf from service invocation overview
Co-authored-by: Mark Fussell <mfussell@microsoft.com>
Yaron Schneider