Asset transfer speed degrading (ABUMN slow)

Hi experts
Any ideas arsenic to however to execute a accelerated inter-company plus transfer?

We are "componentising" assets (breaking a ample singular plus up) into smaller assets with close utile lives utilizing a transportation (transaction codification ABUMN), from aged humanities assets to recently defined assets (at constituent level).

Unfortunately, implicit time, the transaction gets slower and slower owed to the expanding fig of transactions connected the root asset. It started arsenic precocious arsenic 200 transfers per second, and is present taking implicit 4 seconds to bash 1. We person 900,000 components to transportation to.
Any ideas arsenic to however to execute a accelerated transportation betwixt assets?