Struct ExperimentRunner 

pub struct ExperimentRunner {
    pub experiments: HashMap<String, ExperimentState>,
    /* private fields */
}

Manages multiple A/B experiments.

Fields

experiments: HashMap<String, ExperimentState>

Implementations

impl ExperimentRunner

pub fn new() -> Self

Create a new ExperimentRunner.

pub fn create_experiment(&mut self, config: ExperimentConfig) -> String

Register an experiment and return its generated ID.

pub fn assign_variant<'a>( &'a self, experiment_id: &str, user_id: &str, ) -> Option<&'a ExperimentVariant>

Consistently assign a variant to a user using FNV1a hashing.

pub fn record_metric( &mut self, experiment_id: &str, variant_name: &str, value: f64, )

Record a metric value for a variant.

pub fn welch_t_test(a: &[f64], b: &[f64]) -> f64

Run Welch’s t-test between two samples. Returns the two-tailed p-value approximated via the normal CDF.

pub fn cohen_d(a: &[f64], b: &[f64]) -> f64

Cohen’s d effect size: (mean_a - mean_b) / pooled_std

pub fn analyze_experiment( &self, experiment_id: &str, ) -> Option<SignificanceTest>

Pairwise comparison of control (first variant) vs all others.

pub fn experiment_report(&self, experiment_id: &str) -> Option<String>

Generate a text report for an experiment.

Trait Implementations

impl Default for ExperimentRunner

fn default() -> Self

Returns the “default value” for a type.