For Magento 1 there is an informative report about the import performance in https://www.integer-net.de/produktimport-mit-magento/
For Magento 2 and a shop project with < 10 k simple products we successfully used
/* * @var \Magento\ImportExport\Model\Import $import */ $import->validateSource($csvSource); $import->importSource()
But for 300 k products we see a really poor performance for this approach.
Are there any tweaks that allow us to reach the 100 products/seconds or more that the ImportExport of Magento 1 delivered?