
# Carbonara is a Rust library for calculating the energy consumption and CO2e emissions of the Internet.
based on [Green Coding Co2 formulas](https://www.green-coding.io/co2-formulas/)
```rust
use carbonara::{MeasurementConfig, BenchmarkExecutor, PowerSource, MeasurementError};
use std::time::Duration;
// Example usage with Auto power source detection, which will try RAPL first and then fall back to the ACPI power meter,
// if that also fails, it will use TDP based power estimation.
fn main() -> Result<(), MeasurementError> {
let config = MeasurementConfig {
duration: Duration::from_secs(5),
power_source: PowerSource::Auto,
sample_interval_ms: 100,
};
let executor = BenchmarkExecutor::new(config);
let result = executor.measure(|| {
// CPU-intensive workload
for _ in 0..1_000_000 {
let _ = (0..100).sum::<i32>();
}
})?;
println!("{} Measurement Results:", result.measurement_method);
println!("Total Energy: {:?}", result.total_energy);
println!("Average Power: {:?}", result.average_power);
println!("Peak Power: {:?}", result.peak_power);
println!("Duration: {:?}", result.duration);
println!("CO2e: {:.2} g", result.co2e(None));
Ok(())
}
```