Struct SpanInfo 

pub struct SpanInfo {

    pub id: String,
    pub name: String,
    pub cpu_duration: u64,
    pub corrected_duration: u64,
    pub start_relative_to_parent: i64,
    pub end_relative_to_parent: i64,
    pub args: Vec<(String, String)>,
    pub is_aggregated: bool,
    pub count: Option<u64>,
    pub total_cpu_duration: Option<u64>,
    pub avg_cpu_duration: Option<u64>,
    pub total_corrected_duration: Option<u64>,
    pub avg_corrected_duration: Option<u64>,
    pub first_span_id: Option<String>,
    pub memory_samples: Vec<(i64, u64, u8)>,
}

Information about a single span (or aggregated group of spans).

Fields

id: String

Span ID string.

The format encodes both the type and the navigation path:

• A raw span leaf is its decimal index: "123".
• An aggregated span leaf is "a" + the first-span index: "a123".
• When the span is a child of another span, the parent’s ID is prepended with a dash separator, e.g. "a5-a34" or "1-a5-a34-20".

Pass the full ID as the parent option of the next query_spans call to enumerate the children of that span.

name: String

Display name: "category title" or just "title".

cpu_duration: u64

Raw CPU total time in internal ticks (100 ticks = 1 µs). For aggregated spans, this is the first (example) span’s value, not the group total. See total_cpu_duration for the group total.

corrected_duration: u64

Concurrency-corrected total time in internal ticks. For aggregated spans, this is the first (example) span’s value, not the group total. See total_corrected_duration for the group total.

start_relative_to_parent: i64

Start of span relative to parent start, in internal ticks.

end_relative_to_parent: i64

End of span relative to parent start, in internal ticks.

args: Vec<(String, String)>

Key-value attributes from the span.

is_aggregated: bool

True if this entry represents an aggregated group of spans.

count: Option<u64>

Number of spans in the group (only set for aggregated spans).

total_cpu_duration: Option<u64>

Sum of cpu_duration across all spans in the group.

avg_cpu_duration: Option<u64>

Average cpu_duration across all spans in the group.

total_corrected_duration: Option<u64>

Sum of corrected_duration across all spans in the group.

avg_corrected_duration: Option<u64>

Average corrected_duration across all spans in the group.

first_span_id: Option<String>

Raw span ID for aggregated groups (the index of the first span).

memory_samples: Vec<(i64, u64, u8)>

TurboMalloc memory-usage samples recorded while this span (or its example span, for aggregated groups) was live.

Each tuple is (ts_offset_from_span_start_in_ticks, bytes, pressure), where pressure is the memory-pressure byte recorded with the sample (0 = no pressure, higher = more pressure). 100 ticks = 1 µs. The offset is always >= 0 and <= span_duration.

The store caps the series at MAX_MEMORY_SAMPLES; when more samples exist in the range, consecutive groups are merged by picking the group’s max-memory sample (timestamp, value, and pressure kept together).