TASK: Optimize afx rendering by disabling sorting on generated `Neos.Fusion:Join`

[mficzel]

The sorting requires a little compute power that we can spare. In the result this will reduce rendering time of presentational afx about 10%.

Upgrade instructions

This would cause problems when @position is used in afx to reorder children. This makes not much sense imho so i would consider this probably non breaky.

Checklist

• [x] Code follows the PSR-2 coding style
• [x] Tests have been created, run and adjusted as needed
• [x] The PR is created against the lowest maintained branch
• [ ] Reviewer - PR Title is brief but complete and starts with FEATURE|TASK|BUGFIX
• [ ] Reviewer - The first section explains the change briefly for change-logs
• [ ] Reviewer - Breaking Changes are marked with !!! and have upgrade-instructions

[mficzel]

Not sure if this is worth the effort as it would indeed break some use cases.

This change would allow to start working in the following optimizations:

• Render plain html tags as strings or eel
• Combine nested Neos.Fusion:Join Statements
• Combine adjacent string or eel statements inside Neos.Fusion:Join

However while this would indeed improve the fusion performance the effort is quite high and we figured out that the bottleneck during rendering currently is not fusion but eel.

[mficzel]

Close this for now