We present the recent developments on the underlying 100-Gbps optical packet processing technologies for the hybrid optoelectronic router (HOPR) prototype being developed to enable an energy-efficient and low-latency Torus photonic data center network equipped with smart flow-control. In the new 100-Gbps HOPR upgraded from an earlier prototype, we target an energy consumption of 90 mW/Gbps and latency of less than 100 ns. Together with HOPR's architecture, we review the role of the newly developed subsystems namely the label processor, optical switch, and optoelectronic shared buffer in achieving the new targets.