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https://issues.apache.org/jira/browse/AIRFLOW-5639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16950888#comment-16950888
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Ash Berlin-Taylor commented on AIRFLOW-5639:
--------------------------------------------
As you say, right now we need to do this, but we are working towards making
this not needed.
> DagFileProcessor: parse dag files every time, which consume lots of resources
> and is unnecessary
> ------------------------------------------------------------------------------------------------
>
> Key: AIRFLOW-5639
> URL: https://issues.apache.org/jira/browse/AIRFLOW-5639
> Project: Apache Airflow
> Issue Type: Improvement
> Components: scheduler
> Affects Versions: 1.10.5
> Reporter: chen xianxin
> Priority: Major
>
>
> h2. Code
> [https://github.com/apache/airflow/blob/v1-10-stable/airflow/models/dagbag.py#L166-L170]
> h2. Problem description
> *self.file_last_changed* doesn't work, beacause it's set to empty when Dagbag
> is initialized. so even no changes were made to the file, it will also be
> imported. I have sure this problem by print log.
> Generate bagdags from files take about 50% time of dag files processing, if
> only generate bagdags when files are changed, lots of resources will be
> saved.
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