Performance test the various crossgen2 options

[MichaelSimons]

This issue tracks the work to do performance testing on the various crossgen2 options discussed in #1791. The work to implement the Dockerfile is tracked under #1820.

The performance testing should include analyzing the startup time, execution time as well as analyze the size of the various images including the size of the shared layers.

[MichaelSimons]

The following table provides the sizes of the the various crossgen2 options discussed in #1791. These images were produced from 942d7ee by running .\build-and-test.ps1 -Version 5.0 -OS alpine3.11 -Mode Build

Image	Dockerfile	Base Image	Total Size	Owned Layers Size	Shared Layers Size
runtime-deps:5.0-alpine3.11	Dockerfile	alpine:3.11	9.41
runtime:5.0-alpine3.11	Dockerfile	runtime-deps	90.2	80.79	9.41
runtime:5.0-alpine3.11-composite	Dockerfile	runtime-deps	117	107.59	9.41
aspnet:5.0-alpine3.11	Dockerfile	runtime	108	17.8	90.2
aspnet:5.0-alpine3.11-composite	Dockerfile	runtime-deps	152	142.59	9.41
aspnet:5.0-alpine3.11-composed-composite	Dockerfile	runtime:composite	142	25	117
aspnet:5.0-alpine3.11-runtime-composite	Dockerfile	runtime:composite	135	18	117
sdk:5.0-alpine3.11	Dockerfile	runtime-deps	418	408.59	9.41
sdk:5.0-alpine3.11-aspnet-base	Dockerfile	aspnet	418	310	108
sdk:5.0-alpine3.11-aspnet-composite	Dockerfile	aspnet:composite	462	310	152
sdk:5.0-alpine3.11-aspnet-composed-composite	Dockerfile	aspnet:composed-composite	452	310	142
sdk:5.0-alpine3.11-runtime-composite	Dockerfile	aspnet:runtime-composite	445	310	135

All sizes (MB) are the expanded image on disk

[MichaelSimons]

cc @richlander, @davidwrighton

[MichaelSimons]

@davidwrighton - you mentioned the following at #1775 (comment)

The produced image is 152MB, 86MB of which is the composite shared image with just the R2R code in it. Previous efforts on size reduction of the R2R images are not reflected in this number, and will need to be rebuilt

Are these size reduction changes checked in? Do you know what build of crossgen2 I should be trying to get?

[MichaelSimons]

@richlander, @davidwrighton - When do we want @billwert to run some perf tests against these proposed options? What functional validation should we be doing? I have hooked up the docker tests which run and e2e app scenario with these new images.

@billwert - Do you have the infrastructure in place to measure containerized app startup? In order to test the images do you need them published to a Docker registry?

[davidwrighton]

@MichaelSimons size reduction changes will require significant work. It will take a month or two once we are focussed on it.

[davidwrighton]

Also, we are actively working on the correctness of these larger composite images. At the moment, I have relatively little confidence in correctness, but that confidence should grow rapidly over the next month or so.