TASK: Improve flushByTags performance

[daniellienert]

This backports the optimized code from the redis backend of the neos/cache package. (https://github.com/neos/flow-development-collection/blob/8.3/Neos.Cache/Classes/Backend/RedisBackend.php#L297)

[daniellienert]

In my test environment, the optimized method saves about 30 seconds when publishing a page with ~300 nodes.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Project coverage is 28.39%. Comparing base (8a12033) to head (99a7bd1).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
Classes/RedisBackend.php	0.00%	14 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #32      +/-   ##
============================================
- Coverage     28.86%   28.39%   -0.48%     
- Complexity      136      138       +2     
============================================
  Files             2        2              
  Lines           388      405      +17     
============================================
+ Hits            112      115       +3     
- Misses          276      290      +14     

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[daniellienert]

Hey @robertlemke, hope you are doing well!
We are running our projects on this patch for nearly 2 years now. I guess it's worth a look ;)
Cheers
Daniel

[robertlemke]

Thanks a lot, sorry for the late review!