Struct ProfileJudgeOracle 

pub struct ProfileJudgeOracle { /* private fields */ }

JudgeOracle adapter over a ProfileReport. Build once per report (cache lifecycle in fuel_tensor::judge::cache, which stays alongside the Judge that produces the report), query per candidate from the optimizer ranker’s cost composer.

Implementations

impl ProfileJudgeOracle

pub fn from_report(report: &ProfileReport) -> ProfileJudgeOracle

Index every entry of report for exact-match lookup.

Defensive version gate: a report whose version differs from PROFILE_REPORT_VERSION produces an EMPTY oracle (every lookup misses → Layer-1 static costs stand). The persisted-load path already filters stale schemas (ProfileReport::load returns Ok(None)), but an in-memory report of a foreign schema must not feed the cost composer either — pre-v2 reports were ambiguous about which kernel sibling they timed.

pub fn len(&self) -> usize

Number of distinct (op, dtype, size_class, backend, kernel_source) cells indexed.

pub fn is_empty(&self) -> bool

Is the oracle empty (no measurements — every lookup misses)?

Trait Implementations

impl Clone for ProfileJudgeOracle

fn clone(&self) -> ProfileJudgeOracle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProfileJudgeOracle

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

Formats the value using the given formatter.

impl Default for ProfileJudgeOracle

fn default() -> ProfileJudgeOracle

Returns the “default value” for a type.

impl JudgeOracle for ProfileJudgeOracle

fn measured_latency_ns( &self, op: OpKind, dtype: DType, size_class: SizeClass, backend: BackendId, kernel_source: &str, kernel_revision_hash: u64, ) -> Option<u64>

Median wall-clock latency in nanoseconds for the (op, dtype, size_class, backend, kernel_source, kernel_revision_hash) cell. Returns None when the cell isn’t profiled. Callers MUST treat absence as “no measurement” — not “zero” — so the static estimate stays the fallback.