Deegue opened a new pull request #23593: [SPARK-26667][DOC]Add `Scanning Input Table` to Performance Tuning Guide URL: https://github.com/apache/spark/pull/23593 ## What changes were proposed in this pull request? We can use `CombineTextInputFormat` instead of `TextInputFormat` and set configurations to increase the speed while reading a table. There's no need to add spark configurations, so add it to the Performance Tuning. Linked to #23506 ## How was this patch tested? Manually tested
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