Header as Interface

[DavidBadura]

This was my idea of the header implementation. But we went away with the attributes and metadata.

I created the PR to have further discussions to decide how to proceed. There are currently three options:

1. Further expand Metadata Loader: Revisit internal header loading #542
2. Mixing between array and attribute config: load the internal header automatically #541
3. Only php array config (without Metadata/Hydrator): this PR

[github-actions]

Hello 👋

here is the most recent benchmark result:

SubscriptionEngineBench
=======================

+---------------------------+-----------------+-----------------+-----------------+------------+
|                           | time (kde mode)                   | memory                       |
+---------------------------+-----------------+-----------------+-----------------+------------+
| subject                   | Tag: <current>  | Tag: base       | Tag: <current>  | Tag: base  |
+---------------------------+-----------------+-----------------+-----------------+------------+
| benchHandle10000Events () | 3.282s (±0.00%) | 3.268s (±0.00%) | 37.928mb        | 39.066mb   |
+---------------------------+-----------------+-----------------+-----------------+------------+

SplitStreamBench
================

+-------------------------+--------------------+--------------------+-----------------+------------+
|                         | time (kde mode)                         | memory                       |
+-------------------------+--------------------+--------------------+-----------------+------------+
| subject                 | Tag: <current>     | Tag: base          | Tag: <current>  | Tag: base  |
+-------------------------+--------------------+--------------------+-----------------+------------+
| benchLoad10000Events () | 5.684ms (±0.00%)   | 5.548ms (±0.00%)   | 41.610mb        | 42.531mb   |
| benchSave10000Events () | 629.928ms (±0.00%) | 645.917ms (±0.00%) | 41.898mb        | 42.809mb   |
+-------------------------+--------------------+--------------------+-----------------+------------+

SimpleSetupBench
================

+----------------------------------------+--------------------+--------------------+-----------------+------------+
|                                        | time (kde mode)                         | memory                       |
+----------------------------------------+--------------------+--------------------+-----------------+------------+
| subject                                | Tag: <current>     | Tag: base          | Tag: <current>  | Tag: base  |
+----------------------------------------+--------------------+--------------------+-----------------+------------+
| benchLoad10000Events ()                | 150.553ms (±0.00%) | 152.836ms (±0.00%) | 37.489mb        | 38.666mb   |
| benchSave1Event ()                     | 942.600μs (±0.00%) | 925.000μs (±0.00%) | 37.489mb        | 38.666mb   |
| benchSave10000Events ()                | 462.537ms (±0.00%) | 473.298ms (±0.00%) | 37.766mb        | 38.932mb   |
| benchSave10000Aggregates ()            | 9.720s (±0.00%)    | 10.010s (±0.00%)   | 37.489mb        | 38.666mb   |
| benchSave10000AggregatesTransaction () | 7.491s (±0.00%)    | 7.518s (±0.00%)    | 37.489mb        | 38.666mb   |
+----------------------------------------+--------------------+--------------------+-----------------+------------+

SnapshotsBench
==============

+----------------------------------------+--------------------+--------------------+-----------------+------------+
|                                        | time (kde mode)                         | memory                       |
+----------------------------------------+--------------------+--------------------+-----------------+------------+
| subject                                | Tag: <current>     | Tag: base          | Tag: <current>  | Tag: base  |
+----------------------------------------+--------------------+--------------------+-----------------+------------+
| benchLoad10000EventsMissingSnapshot () | 151.526ms (±0.00%) | 156.995ms (±0.00%) | 37.507mb        | 38.663mb   |
| benchLoad10000Events ()                | 533.100μs (±0.00%) | 523.400μs (±0.00%) | 37.507mb        | 38.663mb   |
+----------------------------------------+--------------------+--------------------+-----------------+------------+

This comment gets update everytime a new commit comes in!