make repository rollback safe

[DavidBadura]

• remove instance cache in repository
• move snapshot save from repository save into repository load method
• move batch condition from snapshot store into repository

As a result, neither the repository nor the snapshot store is stateful and can continue to be used after a rollback.

[github-actions]

Hello 👋

here is the most recent benchmark result:

WriteEventsBench
================

Average iteration times by variant

36.1ms    │    ██ 
31.5ms    │    ██ 
27.0ms    │    ██ 
22.5ms    │    ██ 
18.0ms    │    ██ 
13.5ms    │    ██ 
9.0ms     │    ██ 
4.5ms     │ ▃▃ ██ 
          └───────
            1  2  

[█ <current>] [█ base] 

1: benchSaveOneEvent    2: benchSaveAfterThous᠁ 

Memory by variant

7.0mb     │ ▃▃ ██ 
6.1mb     │ ██ ██ 
5.3mb     │ ██ ██ 
4.4mb     │ ██ ██ 
3.5mb     │ ██ ██ 
2.6mb     │ ██ ██ 
1.8mb     │ ██ ██ 
875.2kb   │ ██ ██ 
          └───────
            1  2  

[█ <current>] [█ base] 

1: benchSaveOneEvent    2: benchSaveAfterThous᠁ 

+---------------------------------+-------------------+-------------------+-----------------+------------+
|                                 | time (kde mode)                       | memory                       |
+---------------------------------+-------------------+-------------------+-----------------+------------+
| subject                         | Tag: <current>    | Tag: base         | Tag: <current>  | Tag: base  |
+---------------------------------+-------------------+-------------------+-----------------+------------+
| benchSaveOneEvent ()            | 1.138ms (±14.51%) | 1.241ms (±2.04%)  | 6.373mb         | 6.374mb    |
| benchSaveAfterThousandEvents () | 36.051ms (±1.79%) | 35.551ms (±1.72%) | 7.000mb         | 7.001mb    |
+---------------------------------+-------------------+-------------------+-----------------+------------+

LoadEventsBench
===============

Average iteration times by variant

82.2ms    │ ██ 
71.9ms    │ ██ 
61.7ms    │ ██ 
51.4ms    │ ██ 
41.1ms    │ ██ 
30.8ms    │ ██ 
20.6ms    │ ██ 
10.3ms    │ ██ 
          └────
            1  

[█ <current>] [█ base] 

1: benchLoadEvents 

Memory by variant

19.1mb    │ ██ 
16.7mb    │ ██ 
14.3mb    │ ██ 
11.9mb    │ ██ 
9.5mb     │ ██ 
7.2mb     │ ██ 
4.8mb     │ ██ 
2.4mb     │ ██ 
          └────
            1  

[█ <current>] [█ base] 

1: benchLoadEvents 

+--------------------+-------------------+-------------------+-----------------+------------+
|                    | time (kde mode)                       | memory                       |
+--------------------+-------------------+-------------------+-----------------+------------+
| subject            | Tag: <current>    | Tag: base         | Tag: <current>  | Tag: base  |
+--------------------+-------------------+-------------------+-----------------+------------+
| benchLoadEvents () | 82.223ms (±0.33%) | 81.998ms (±1.53%) | 19.096mb        | 19.097mb   |
+--------------------+-------------------+-------------------+-----------------+------------+

LoadEventsWithSnapshotsBench
============================

Average iteration times by variant

269.9μs   │ ▇█ 
236.2μs   │ ██ 
202.4μs   │ ██ 
168.7μs   │ ██ 
134.9μs   │ ██ 
101.2μs   │ ██ 
67.5μs    │ ██ 
33.7μs    │ ██ 
          └────
            1  

[█ <current>] [█ base] 

1: benchLoadEvents 

Memory by variant

13.1mb    │ ██ 
11.5mb    │ ██ 
9.8mb     │ ██ 
8.2mb     │ ██ 
6.6mb     │ ██ 
4.9mb     │ ██ 
3.3mb     │ ██ 
1.6mb     │ ██ 
          └────
            1  

[█ <current>] [█ base] 

1: benchLoadEvents 

+--------------------+--------------------+--------------------+-----------------+------------+
|                    | time (kde mode)                         | memory                       |
+--------------------+--------------------+--------------------+-----------------+------------+
| subject            | Tag: <current>     | Tag: base          | Tag: <current>  | Tag: base  |
+--------------------+--------------------+--------------------+-----------------+------------+
| benchLoadEvents () | 262.200μs (±0.38%) | 269.897μs (±0.56%) | 13.106mb        | 13.111mb   |
+--------------------+--------------------+--------------------+-----------------+------------+

This comment gets update everytime a new commit comes in!