[Issue] Improve setup:di:compile performance by using gc_disable

[m2-assistant]

This issue is automatically created based on existing pull request: #38032: Improve setup:di:compile performance by using gc_disable

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Description (*)

By disabling garbage collector the code generation finishes a bit faster:

1. Result for this contribution repo
   

With larger apps the difference is not that significant but noticeable
2.

• 2 minutes without changes
  

• under 2 minutes with changes
  

I also checked calling gc_collect_cycles after each operation to save some memory, but the difference is not that significant and visible on the second screenshot.

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes magento/magento2#<issue_number>

Manual testing scenarios (*)

1. Run setup:di:compile on different CPUs with and without changes
2. Compare execution time

Questions or comments

1. More tests needed on different CPUs.
2. The actual result may vary per project, depending from number of plugins/factories/proxies needed to detect and generate.

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)