insert() process slow compared to nano-graphRAG

[timelesshc]

I'm testing both lightRAG and nano-graphRAG at the same time. It seems these two approaches have very similar graph indexing structure. However, the insert() (graph construction) process of nano-graphRAG is much faster than lightRAG using the same setup. What would be the cause of this difference? Is there a way to optimize the insert() process of lightRAG?