Enum RollbackPolicy 

pub enum RollbackPolicy {
    Revert,
    Keep,
    HalveDamping,
}

What to do when a step makes the multi-seed mean loss WORSE than the best-seen value (by more than the noise floor).

Variants

Revert

Revert the knob to its pre-step value and try a different patch on the next iteration.

Keep

Keep the worse θ — the optimizer accepts noise; useful for pure gradient-descent-style runs that should walk uphill occasionally to escape plateaus.

HalveDamping

Halve the loop’s effective damping and re-propose the same patch direction on the next iteration. Simulated-annealing flavour.

Trait Implementations

impl Clone for RollbackPolicy

fn clone(&self) -> RollbackPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RollbackPolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RollbackPolicy

fn default() -> RollbackPolicy

Returns the “default value” for a type.

impl PartialEq for RollbackPolicy

fn eq(&self, other: &RollbackPolicy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for RollbackPolicy

impl Eq for RollbackPolicy

impl StructuralPartialEq for RollbackPolicy