> For the complete documentation index, see [llms.txt](https://docs.arcology.network/arcology-architecture-overview/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arcology.network/arcology-architecture-overview/tpp.md).

# Signature Verifier

TPP is the transaction processing module responsible for the signature verification and other transaction pre-checking before forwarding them to the pool service. Signature verification could be a serious bottleneck when processing large volumes of transactions. So in general, starting multiple instances will certainly help with overall performance.