Potential issues with barrel files in Jest

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  • jest

    Delightful JavaScript Testing.

    One of the most common complaints from developers who use Jest often report slow test execution times when their code includes barrel files #1. While this might not be noticeable in smaller projects, it becomes a significant issue in larger ones.

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

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  • babel-plugin-transform-barrels

    A Babel plugin that transforms indirect imports through a barrel file (index.js) into direct imports.

    While using barrel files can offer benefits for developer experience, it can also lead to performance issues and unexpected test results in Jest. To resolve them, use the babel-plugin-transform-barrels plugin, which transforms indirect imports (through barrel files) into direct imports.

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