Weekly Summary – January 6, 2025

Rust simulation

• Added a basic simulation of central processing unit (CPU) usage/latency
• Implemented 'lottery won' events to identify the start of CPU processing
• Configured each node with four simulated cores, adjustable per node
• Transaction validation and ranking block/input block/endorser block generation/validation each take one CPU task
• All virtual CPU costs were copied from the cost estimator.

DeltaQ summary update

• Added MIN/MAX combinators for best- and worst-case simulation results
• The Rust simulation best case does not match the analytically best behavior
• The Haskell simulation best case is too fast; the ΔQ expression must assume more than 200 peers per node.

Cost dashboard updates

• Improved input parameters and computations
• Lengthened phases and reduced endorser block rate
• Updated CPU costs for votes and certificates
• Revised input/output operations per second (IOPS) values based on empirical data from Cardano nodes.

Benchmarking BLS signatures

• Benchmarked BLS votes using the Rust bls-signatures package
• Aggregate verification significantly speeds up the process
• Provided CPU time estimates for various operations.

Votes and certificates

• Updated size estimates for votes
• Added CPU time estimates for BLS votes and certificates
• Drafted technical report sections on BLS and MUSEN certificates.

Sortition analysis

• Analyzed sortition for input and endorser blocks and votes
• Added findings to the draft of the first technical report.