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Hotspot reading ImageMeta in EventSparseTensor #10

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coreyjadams opened this issue Jun 4, 2019 · 0 comments

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coreyjadams commented Jun 4, 2019

The following lines account for just over 50% of the execution time in EventSparseTensor::deserialize:

larcv3/src/larcv3/core/dataformat/EventSparseTensor.cxx

Lines 639 to 641 in 0663596

    
           _open_datasets[IMAGE_META_DATASET].read(&(image_meta[0]),  
        
             *_data_types[IMAGE_META_DATASET],  
        
             image_meta_memspace, _open_dataspaces[IMAGE_META_DATASET]);

This was seen using NEXT NEW datasets in the double escape peak analysis.

The image meta object should not be so large, this hotspot is very odd. Should be investigated.

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