While profiling a site that is very lightly using this module, I noticed Drupal\business_rules\Util\Flowchart\Matrix::__construct using a decent chunk of memory, over 4MB.
The page I was profiling was not displaying any flowcharts. Based on my quick look at the architecture, the Drupal\business_rules\Util\BusinessRulesUtil class might end up being loaded on nearly every page of a Drupal site, and that loads the flowchart util class, which in turns builds a matrix.
Only initialize the matrix when a flowchart is being built.
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I wouldn't consider this an API change but I am proposing to change the constructor of Drupal\business_rules\Util\Flowchart\Flowchart so maintainers should keep that in mind.
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Probably doesn't need to be included in release notes.
Fixed
1.0
Code
It affects performance. It is often combined with the Needs profiling tag.
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Issue #3135986 by star-szr: Performance: Only build matrix for flowchart...
Automatically closed - issue fixed for 2 weeks with no activity.