Enum Variance 

pub enum Variance {
    Nominal,
    Pessimistic,
    Seeded(u64),
}

How the run-to-run swing of seek time is modelled. The measured table is one run; the survey reports the true value swinging by about 2x.

Variants

Nominal

Seeks take the table value.

Pessimistic

Every seek takes twice the table value: the design’s pessimistic corner (“the swing applies to the seek only”).

Seeded(u64)

Each seek takes the table value times a factor drawn uniformly from 1.0 to 2.0 by a deterministic generator seeded with this value.

Trait Implementations

impl Clone for Variance

fn clone(&self) -> Variance

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Variance

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

Formats the value using the given formatter.

impl PartialEq for Variance

fn eq(&self, other: &Variance) -> 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 Variance

impl Eq for Variance

impl StructuralPartialEq for Variance