Gutenboarding: Performance Improvements

[ockham]

@sgomes looked into Gutenboarding's performance and reported a few items that could need improvement (p1584972373304500-slack-gutenboarding):

• Gutenberg dependencies. showdown is pretty big, at 23KB. react-dates is an absurd 37.5KB. moment-timezone is also big. (These need upstream fixing in Gutenberg).
• wpcom:
• We're currently only using getCart and setCart. Should replace by directly using wpcom-proxy-request.
• Let's make an eslint rule against importing wpcom (maybe Calypso-wide; I guess we can consider this legacy and recommend against it) /cc @Automattic/team-calypso (ESLint: Restrict imports and requires from lib/wp #40371)
• lib/analytics. People have started moving stuff into https://github.com/Automattic/wp-calypso/tree/master/packages/calypso-analytics; @sgomes will look into this.
• Look why calypso-i18n is pulled in Gutenboarding: Remove NO translation prefix #39906 (comment)
• async plans loading Gutenboarding: Lazy load plans #41481
• prefetch design thumbnails Proposal: preload design thumbs for a nicer UX #42494 Design previews: use prefetch instead of preload for better perf #42617 (props @alshakero)
• Remove dashicons (Forcibly remove dashicon from build #42577, Gutenboarding: Use @wordpress/icons #42325)

[sgomes]

PR with some improvements for lib/analytics: #40372 . It may unlock future gains by modularising, but produces no improvements by itself at the moment.

[github-actions]

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[inaikem]

@sgomes, checking in for an update on this issue. Is is closable (as complete or otherwise)?

For context, several of us are working on a cross-functional group triage effort in Dotcom to help us better manage our issue backlog. Thanks!

[sgomes]

Hey @inaikem! 👋 Sure, happy to help!

I'm sure that any findings are woefully out of date or entirely inapplicable at this point. No need to keep this around, so I'll close as not planned 👍

[tyxla]

For context, Gutenboarding was removed a while ago, making this issue no longer relevant: #74475