Struct Observation 

pub struct Observation {
    pub outcome: &'static str,
    pub rows: u64,
    pub bytes: u64,
    pub requests: u64,
    pub debug_ms: u64,
    pub error: Option<String>,
    pub recorded: Option<Recorded>,
}

One starter query, actually run.

Fields

outcome: &'static str

answers (rows with bindings), vacuous (rows that bind nothing), empty (no rows at all), or error (the run did not finish).

rows: u64

bytes: u64

Bytes the run read, cold, open included.

requests: u64

Range requests the run made, cold, open included.

debug_ms: u64

Wall clock on the measuring machine — a reference, not a property of the file. Read it next to bytes/requests, never on its own.

error: Option<String>

recorded: Option<Recorded>

What the file’s own build record says this query cost — present only when the file carries one. That is the single case where a re-measurement has a known answer to check itself against, so it is checked, and the answer is reported rather than assumed.

Implementations

impl Observation

pub fn contradicts(&self, verdict: Verdict) -> bool

Does the observation contradict what the card alone concluded? Only Answers and Empty are claims strong enough to be wrong; Suspect and Undecidable say in so many words that they are not claims.

Trait Implementations

impl Clone for Observation

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Observation

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

Formats the value using the given formatter.

impl Serialize for Observation

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.