gossamer - v10.0.0

gossamer/performance_entry

A single entry on the performance timeline — a mark, a measure, or another runtime-recorded metric. Returned by performance.entries and the entries_* queries, and delivered to performance_observer callbacks.

Every entry carries the four base fields the W3C PerformanceEntry interface defines (name, entryType, startTime, duration). The entryType string surfaces as a typed Kind; the original JavaScript entry stays accessible via raw for kind- specific decoding through gleam/dynamic/decode.

Project to a typed Mark or Measure via the submodules’ from_entry helpers.

Types

Kind

</>

The kind of entry on the performance timeline. Names match the W3C Performance Timeline registry; OtherKind(value) carries any runtime-emitted kind gossamer doesn’t recognize. Runtimes only emit a subset — see performance_observer.supported_entry_types.

pub type Kind {
  MarkKind
  MeasureKind
  OtherKind(String)
}

Constructors 

  • MarkKind

    User-recorded mark (performance.mark).

  • MeasureKind

    User-recorded measurement (performance.measure).

  • OtherKind(String)

    Any other entry-type string the runtime exposes that this binding doesn’t recognize.

PerformanceEntry

</>

An entry on the performance timeline. Carries the W3C base fields plus a typed Kind discriminator and a raw reference to the original JavaScript entry for kind-specific decoding.

pub type PerformanceEntry {
  PerformanceEntry(
    name: String,
    start_time: duration.Duration,
    duration: duration.Duration,
    kind: Kind,
    raw: dynamic.Dynamic,
  )
}

Constructors 

  • PerformanceEntry(
  name: String,
  start_time: duration.Duration,
  duration: duration.Duration,
  kind: Kind,
  raw: dynamic.Dynamic,
)

    Arguments

    name

    The entry’s name. For marks and measures, the name the user recorded; for other kinds, an entry-type-specific label.

    start_time

    When the entry began, relative to performance.time_origin.

    duration

    The entry’s span length. Zero for marks and other point-in- time kinds.

    kind

    The kind of entry — MarkKind / MeasureKind / OtherKind for everything else.

    raw

    The original JavaScript entry, for manual decoding via gleam/dynamic/decode.

✨ Search Document