Push large amounts of data against Magento1.9's APi?
we are developing an ERP<->Magento Interface and are wondering if it is ok to push large ammounts of data against Magento 1.9s API. I have heard there are performance issues when it comes to Magento's API, that influences customer experience using the shop (delays, lockouts etc.). We are talking about hourly stock keeping information per Item and possibly item cataloge import via API.
If not we are thinking to build an extension for csv import to magento.