How to calculate timestamp difference in logstash config file?

Elastic Stack Logstash
1

I have two timestamp fields: submit_date("MM/dd/YYYY HH:mm") and completed date("MM/dd/YYYY HH:mm").
I want to calculate time difference between these two fields and wanted to add it as a new field while ingesting data in Elasticsearch.

any help will be appreciated.
Thank you.

2

Parse them both using date filters, then use ruby to calculate the difference. Something like this.

3

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