Add benchmark tests

[0xgetz]

Implement performance benchmarks for all packages to track and optimize performance.

Objectives

• Create benchmark suite for each package
• Measure key performance metrics (execution time, memory usage)
• Set up automated benchmark reporting
• Establish performance baselines

Tools to Consider

• benchmark.js
• Node.js built-in perf_hooks
• custom benchmarking scripts

Acceptance Criteria

• Benchmarks exist for all core functions
• Benchmark results are tracked over time
• Performance regression detection is in place
• Benchmark documentation is available