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https://issues.apache.org/jira/browse/AIRFLOW-6869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17042031#comment-17042031
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ASF GitHub Bot commented on AIRFLOW-6869:
-----------------------------------------

mik-laj commented on pull request #7489: [AIRFLOW-6869][WIP] Bulk fetch DAGRun
URL: https://github.com/apache/airflow/pull/7489
 
 
   Another performance optimization.
   When a DAG file contains 200 DAGs, and each DAG contains 5 tasks, we get the 
following values.
   **Before:**
   Query count:  1792
   Average time: 5842.346 ms
   **After:**
   Query count:  1395
   Average time: 4839.020 ms
   **Diff:**
   Query count: -397 (-22%)
   Average time: -1003 ms (-17%)
   
   If I didn't make a mistake, when we combine the following changes:
   * https://github.com/apache/airflow/pull/7481
   * https://github.com/apache/airflow/pull/7477
   * https://github.com/apache/airflow/pull/7476
   
   we get only... 5 query per file instead of ....1792
   
   Thanks for support to @evgenyshulman from Databand!
   
   ---
   Issue link: WILL BE INSERTED BY 
[boring-cyborg](https://github.com/kaxil/boring-cyborg)
   
   Make sure to mark the boxes below before creating PR: [x]
   
   - [X] Description above provides context of the change
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   - [X] Unit tests coverage for changes (not needed for documentation changes)
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   - [X] Relevant documentation is updated including usage instructions.
   - [X] I will engage committers as explained in [Contribution Workflow 
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   <sup>*</sup> For document-only changes commit message can start with 
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   ---
   In case of fundamental code change, Airflow Improvement Proposal 
([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+Proposals))
 is needed.
   In case of a new dependency, check compliance with the [ASF 3rd Party 
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> Bulk fetch DAGRun
> -----------------
>
>                 Key: AIRFLOW-6869
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-6869
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 1.10.9
>            Reporter: Kamil Bregula
>            Priority: Major
>




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