beliefer opened a new pull request #28081: [SPARK-31315][SQL][TEST] SQLQueryTestSuite: Display the total compile time for generated java code URL: https://github.com/apache/spark/pull/28081 ### What changes were proposed in this pull request? After my investigation, `SQLQueryTestSuite` spent a lot of time compiling the generated java code. We should display the total compile time for generated java code. This PR will add the following to `SQLQueryTestSuite`'s output. ``` === Metrics of Whole Codegen === Total compile time: 80.564516529 seconds ``` Note: At first, I wanted to use `CodegenMetrics.METRIC_COMPILATION_TIME` to do this. After many experiments, I found that `CodegenMetrics.METRIC_COMPILATION_TIME` is only effective for a single test case, and cannot play a role in the whole life cycle of `SQLQueryTestSuite`. ### Why are the changes needed? Display the total compile time for generated java code. ### Does this PR introduce any user-facing change? 'No'. ### How was this patch tested? Jenkins test.
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