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TrendDetector

presentar_terminal::perf_trace

Struct TrendDetector 

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pub struct TrendDetector { /* private fields */ }
Expand description

Trend detection using linear regression slope (trueno-viz pattern)

Detects upward/downward/flat trends using a sliding window approach. Uses simplified slope calculation for O(1) updates.

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impl TrendDetector

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pub fn new(threshold: f64) -> Self

Create a new trend detector

§Arguments
  • threshold - Minimum slope magnitude to detect trend
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pub fn for_percentage() -> Self

Create for percentage changes (0.5% threshold)

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pub fn for_latency() -> Self

Create for latency changes (1ms threshold)

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pub fn update(&mut self, value: f64)

Update with a new value (O(1))

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pub fn slope(&self) -> f64

Calculate slope (O(1))

Uses least squares linear regression formula: slope = (n * Σxy - Σx * Σy) / (n * Σx² - (Σx)²)

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pub fn trend(&self) -> Trend

Get current trend (O(1))

Check if trending up

Check if trending down

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pub fn count(&self) -> u64

Get sample count

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pub fn reset(&mut self)

Reset detector

Trait Implementations§

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impl Clone for TrendDetector

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fn clone(&self) -> TrendDetector

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for TrendDetector

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

Formats the value using the given formatter. Read more
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impl Default for TrendDetector

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fn default() -> Self

Returns the “default value” for a type. Read more

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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