Revert "Revert "Add sites migration banner""

[renatho]

Adding the changes from #95298 again.

It was reverted on #95388 as a test because of build tests, but it wasn't the cause.

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-121932

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-121932&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-121932&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~983 bytes added 📈 [gzipped])

name                             parsed_size           gzip_size
staging-site                          +769 B  (+0.0%)     +247 B  (+0.1%)
sites-dashboard                       +769 B  (+0.1%)     +247 B  (+0.1%)
site-performance                      +769 B  (+0.0%)     +247 B  (+0.1%)
site-monitoring                       +769 B  (+0.1%)     +247 B  (+0.1%)
site-logs                             +769 B  (+0.1%)     +247 B  (+0.1%)
hosting-features                      +769 B  (+0.1%)     +247 B  (+0.1%)
hosting                               +769 B  (+0.0%)     +247 B  (+0.0%)
github-deployments                    +769 B  (+0.1%)     +247 B  (+0.1%)
write-flow                            +334 B  (+0.0%)      +54 B  (+0.0%)
videopress-flow                       +334 B  (+0.0%)      +49 B  (+0.0%)
update-design-flow                    +334 B  (+0.0%)      +55 B  (+0.0%)
themes                                +334 B  (+0.0%)      +49 B  (+0.0%)
theme                                 +334 B  (+0.0%)      +53 B  (+0.0%)
stats                                 +334 B  (+0.0%)      +55 B  (+0.0%)
site-purchases                        +334 B  (+0.0%)      +47 B  (+0.0%)
site-blocks                           +334 B  (+0.0%)      +54 B  (+0.0%)
settings-security                     +334 B  (+0.1%)      +54 B  (+0.0%)
settings-podcast                      +334 B  (+0.1%)      +54 B  (+0.0%)
settings-performance                  +334 B  (+0.1%)      +54 B  (+0.0%)
settings                              +334 B  (+0.0%)      +47 B  (+0.0%)
sensei-flow                           +334 B  (+0.1%)      +54 B  (+0.0%)
security                              +334 B  (+0.0%)      +46 B  (+0.0%)
reader                                +334 B  (+0.0%)      +42 B  (+0.0%)
purchases                             +334 B  (+0.0%)      +47 B  (+0.0%)
privacy                               +334 B  (+0.0%)      +54 B  (+0.0%)
posts-custom                          +334 B  (+0.1%)      +54 B  (+0.0%)
posts                                 +334 B  (+0.0%)      +54 B  (+0.0%)
plugins                               +334 B  (+0.0%)      +47 B  (+0.0%)
plans                                 +334 B  (+0.0%)      +49 B  (+0.0%)
people                                +334 B  (+0.1%)      +54 B  (+0.0%)
notification-settings                 +334 B  (+0.0%)      +54 B  (+0.0%)
media                                 +334 B  (+0.0%)      +46 B  (+0.0%)
me                                    +334 B  (+0.0%)      +54 B  (+0.0%)
marketing                             +334 B  (+0.0%)      +54 B  (+0.0%)
link-in-bio-tld-flow                  +334 B  (+0.0%)      +49 B  (+0.0%)
jetpack-cloud-plugin-management       +334 B  (+0.0%)      +47 B  (+0.0%)
jetpack-cloud-partner-portal          +334 B  (+0.0%)      +54 B  (+0.0%)
jetpack-cloud-agency-sites-v2         +334 B  (+0.0%)      +41 B  (+0.0%)
home                                  +334 B  (+0.0%)      +49 B  (+0.0%)
help                                  +334 B  (+0.0%)      +54 B  (+0.0%)
email                                 +334 B  (+0.0%)      +54 B  (+0.0%)
earn                                  +334 B  (+0.0%)      +55 B  (+0.0%)
domains                               +334 B  (+0.0%)      +47 B  (+0.0%)
developer                             +334 B  (+0.0%)      +54 B  (+0.0%)
copy-site-flow                        +334 B  (+0.0%)      +54 B  (+0.0%)
build-flow                            +334 B  (+0.0%)      +54 B  (+0.0%)
backup                                +334 B  (+0.0%)      +54 B  (+0.0%)
activity                              +334 B  (+0.0%)      +54 B  (+0.0%)
account-close                         +334 B  (+0.0%)      +54 B  (+0.0%)
account                               +334 B  (+0.0%)      +47 B  (+0.0%)
a8c-for-agencies-sites                +334 B  (+0.0%)      +41 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Async-loaded Components (~103 bytes added 📈 [gzipped])

name                                                     parsed_size           gzip_size
async-load-signup-steps-domains                               +334 B  (+0.1%)      +54 B  (+0.0%)
async-load-design-playground                                  +334 B  (+0.0%)      +54 B  (+0.0%)
async-load-design-blocks                                      +334 B  (+0.0%)      +49 B  (+0.0%)
async-load-design                                             +334 B  (+0.0%)      +54 B  (+0.0%)
async-load-calypso-post-editor-editor-media-modal             +334 B  (+0.0%)      +54 B  (+0.0%)
async-load-calypso-my-sites-current-site-notice               +334 B  (+0.6%)      +54 B  (+0.3%)
async-load-calypso-components-web-preview-component           +334 B  (+0.1%)      +54 B  (+0.0%)
async-load-calypso-blocks-jitm-templates-sidebar-banner       +334 B  (+0.7%)      +54 B  (+0.3%)
async-load-calypso-blocks-jitm-templates-notice               +334 B  (+0.7%)      +54 B  (+0.3%)
async-load-calypso-blocks-jitm-templates-default              +334 B  (+0.7%)      +54 B  (+0.3%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.