alamb commented on issue #348:
URL: 
https://github.com/apache/arrow-datafusion/issues/348#issuecomment-1029436437


   I ran the following to see where the time was going in my normal development 
loop: 
   ```
   cargo +nightly test -p datafusion -Z timings
   ```
   
   
   And the output was instructive. Specifically it seems to take 28.6 seconds 
to compile the actual datafusion crate, but a whopping 65.6s to compile the 
tests (aka `cfg(test)`). I'll keep plugging away at moving test code out of the 
`datafusion` crate and into integration tests 
   
   ```
      Completed datafusion v6.0.0 in 28.6s
      Completed datafusion v6.0.0 test "merge_fuzz" (test) in 4.6s
      Completed datafusion v6.0.0 test "order_spill_fuzz" (test) in 4.7s
      Completed datafusion v6.0.0 test "simplification" (test) in 4.8s
      Completed datafusion v6.0.0 test "dataframe" (test) in 6.1s
      Completed datafusion v6.0.0 test "provider_filter_pushdown" (test) in 6.7s
      Completed datafusion v6.0.0 test "custom_sources" (test) in 6.7s
      Completed datafusion v6.0.0 test "statistics" (test) in 6.8s
      Completed datafusion v6.0.0 test "path_partition" (test) in 6.9s
      Completed datafusion v6.0.0 test "user_defined_plan" (test) in 7.0s
      Completed datafusion v6.0.0 test "dataframe_functions" (test) in 7.4s
      Completed datafusion v6.0.0 test "parquet_pruning" (test) in 7.9s
      Completed datafusion v6.0.0 test "sql_integration" (test) in 19.2s
      Completed datafusion v6.0.0 lib (test) in 65.6s
   ```
   


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