About ld refinement on putative somatic SNVs, spend a lot of time

[monoplasty]

Hello, I use single cell sequencing data to run somatic SNV calling from scRNA-seq. It takes a lot of time when I run the second step (cellScan), about 30+ hours. Is there any way to improve the running speed?

The bam file used is about 8G, and the cpu has 32 cores.

Could you please provide some guidance on how to resolve this issue? Thank you in advance for your assistance.