Function build_report 

pub fn build_report(
    results: &[BenchExecutionResult],
    stats: &[(String, Option<SummaryStatistics>)],
    config: &ExecutionConfig,
    total_duration_ms: f64,
) -> Report

Build a complete Report from execution results

Uses parallel computation for bootstrap CI calculations (the expensive part).

Arguments

• results - Benchmark execution results
• stats - Pre-computed summary statistics for each benchmark
• config - Execution configuration (for bootstrap settings)
• total_duration_ms - Total execution time in milliseconds

Returns

Complete Report structure ready for output