SLPDB does not currently use ACID transactions when processing, this can cause temporarily inconsistent state and prevents the ability to rollback on error. A previous attempt at implementing ACID transactions was performed which resulted in reduced stability.
SLPDB currently performs much extra work than needed resulting in reduced performance due to to InsertReplace operations in db.ts. If these were optimized SLPDB could support more transactions per second. In handleMempoolTransaction UpdateStatistics is called which performs a graphInsertReplace, for larger tokens this takes a long time.