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[SPARK-54958][PYTHON][ML][TEST] Accelerate test_cv_io_pipeline.py #53725

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[SPARK-54958][PYTHON][ML][TEST] Accelerate test_cv_io_pipeline.py #53725

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385866a
Accelerate test_cv_io_pipeline.py
gaogaotiantian Jan 8, 2026
0fcd273
Fix lint
gaogaotiantian Jan 8, 2026
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14 changes: 11 additions & 3 deletions python/pyspark/ml/tests/tuning/test_cv_io_pipeline.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#

import tempfile
from concurrent.futures import ThreadPoolExecutor

from pyspark.ml.feature import HashingTF, Tokenizer
from pyspark.ml import Pipeline
Expand Down Expand Up @@ -54,7 +55,7 @@ def _run_test_save_load_pipeline_estimator(self, LogisticRegressionCls):
tokenizer = Tokenizer(inputCol="text", outputCol="words")
hashingTF = HashingTF(inputCol=tokenizer.getOutputCol(), outputCol="features")

ova = OneVsRest(classifier=LogisticRegressionCls())
ova = OneVsRest(classifier=LogisticRegressionCls(), parallelism=2)
lr1 = LogisticRegressionCls().setMaxIter(5)
lr2 = LogisticRegressionCls().setMaxIter(10)

Expand All @@ -72,6 +73,7 @@ def _run_test_save_load_pipeline_estimator(self, LogisticRegressionCls):
estimatorParamMaps=paramGrid,
evaluator=MulticlassClassificationEvaluator(),
numFolds=2,
parallelism=4,
) # use 3+ folds in practice
cvPath = temp_path + "/cv"
crossval.save(cvPath)
Expand Down Expand Up @@ -100,6 +102,7 @@ def _run_test_save_load_pipeline_estimator(self, LogisticRegressionCls):
estimatorParamMaps=paramGrid,
evaluator=MulticlassClassificationEvaluator(),
numFolds=2,
parallelism=4,
) # use 3+ folds in practice
cv2Path = temp_path + "/cv2"
crossval2.save(cv2Path)
Expand All @@ -126,8 +129,13 @@ def _run_test_save_load_pipeline_estimator(self, LogisticRegressionCls):
self.assertEqual(loadedStage.uid, originalStage.uid)

def test_save_load_pipeline_estimator(self):
self._run_test_save_load_pipeline_estimator(LogisticRegression)
self._run_test_save_load_pipeline_estimator(DummyLogisticRegression)
with ThreadPoolExecutor(max_workers=2) as executor:
list(
executor.map(
self._run_test_save_load_pipeline_estimator,
[LogisticRegression, DummyLogisticRegression],
)
)


if __name__ == "__main__":
Expand Down