✨ FFL-16 Precomputed flags evaluation

[leoromanovsky]

Motivation

Precomputed flags evaluation + small fixes on top of #3554.

🐛 Open Bug: unit tests were failing in chrome 63 (https://gitlab.ddbuild.io/DataDog/browser-sdk/-/jobs/959532643) and trying to fix with changes to polyfill.

Changes

• Precomputed flags evaluation
• Fetching remote configuration
• Option to set initial configuration from configuration wire

See individual commits for more details.

Test instructions

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 59.64912% with 23 lines in your changes missing coverage. Please review.

Project coverage is 92.12%. Comparing base (a0a7fdb) to head (9437999).

Files with missing lines	Patch %	Lines
packages/flagging/src/openfeature/provider.ts	51.61%	15 Missing ⚠️
packages/flagging/src/configuration/wire.ts	53.33%	7 Missing ⚠️
packages/flagging/src/evaluation.ts	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3580      +/-   ##
==========================================
- Coverage   92.33%   92.12%   -0.22%     
==========================================
  Files         319      322       +3     
  Lines        8104     8161      +57     
  Branches     1831     1840       +9     
==========================================
+ Hits         7483     7518      +35     
- Misses        621      643      +22     

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[BenoitZugmeyer]

suggestion: (as discussed) it could be nice to rename the package folder as well

[leoromanovsky]

My notes from the conversation was we left it without consensus but I am ok revisiting it as the SDK scope becomes more clear; there might be more than just the openfeature provided being exported; perhaps where we will land is a core flagging package (here or in a shared javascript repository with react native) and openfeature provider as a wrapper on it.

[BenoitZugmeyer]

Sounds good to me.

[cit-pr-commenter]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	146.07 KiB	146.07 KiB	0 B	0.00%	✅
Rum Recorder	18.02 KiB	18.02 KiB	0 B	0.00%	✅
Rum Profiler	4.63 KiB	4.63 KiB	0 B	0.00%	✅
Logs	50.26 KiB	50.26 KiB	0 B	0.00%	✅
Flagging	0 B	25.82 KiB	25.82 KiB	N/A%	✅
Rum Slim	105.70 KiB	105.70 KiB	0 B	0.00%	✅
Worker	23.59 KiB	23.59 KiB	0 B	0.00%	✅

🚀 CPU Performance

Action Name	Base Average Cpu Time (ms)	Local Average Cpu Time (ms)	𝚫
addglobalcontext	0.008	0.008	0.000
addaction	0.037	0.030	-0.007
addtiming	0.006	0.010	0.004
adderror	0.029	0.036	0.008
startstopsessionreplayrecording	0.001	0.002	0.000
startview	0.007	0.011	0.004
logmessage	0.026	0.048	0.022

🧠 Memory Performance

Action Name	Base Consumption Memory (bytes)	Local Consumption Memory (bytes)	𝚫 (bytes)
addglobalcontext	27.61 KiB	26.35 KiB	-1292 B
addaction	58.35 KiB	52.87 KiB	-5613 B
addtiming	26.95 KiB	24.62 KiB	-2383 B
adderror	62.91 KiB	57.48 KiB	-5554 B
startstopsessionreplayrecording	25.95 KiB	23.50 KiB	-2516 B
startview	432.13 KiB	428.58 KiB	-3637 B
logmessage	55.49 KiB	55.45 KiB	-48 B

🔗 RealWorld