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20834c9d47
This allows performance debugging to be turned on by setting: ```nushell $env.POLARS_PLUGIN_PERF = "true" ``` Furthermore, this improves the other plugin debugging by allowing the env variable for debugging to be set at any time versus having to be available when nushell is launched: ```nushell $env.POLARS_PLUGIN_DEBUG = "true" ``` This plugin introduces a `perf` function that will output timing results. This works very similar to the perf function available in nu_utils::utils::perf. This version prints everything to std error to not break the plugin stream and uses the engine interface to see if the env variable is configured. This pull requests uses this `perf` function when: * opening csv files as dataframes * opening json lines files as dataframes This will hopefully help provide some more fine grained information on how long it takes polars to open different dataframes. The `perf` can also be utilized later for other dataframes use cases. |
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