Contender

Contender is a high-performance Ethereum transaction spammer and benchmarking tool. It’s built for repeatable load tests against EL clients and networks.

Key capabilities

• Config-driven generation via TOML “scenarios”
• Timing modes: per-second (TPS) and per-block (TPB)
• Seeded fuzzing for reproducibility
• SQLite-backed state for contracts, runs, and reports
• Extensible tx generators and callbacks

See also the built-in scenarios in /scenarios/ for ready-to-run examples.