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FitScratch

scx_mlfq::mlfq_tree

Struct FitScratch 

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pub struct FitScratch {
    pub weights: Vec<f64>,
    pub sorted: Vec<(TreeSample, f64)>,
    pub left: Vec<(TreeSample, f64)>,
    pub right: Vec<(TreeSample, f64)>,
    pub nodes: Vec<TreeNode>,
    pub queue: VecDeque<NodeSpec>,
    pub preds: Vec<u64>,
    pub actuals: Vec<u64>,
    pub ema_preds: Vec<u64>,
    pub weights_full: Vec<f64>,
}
Expand description

Scratch buffers for the CART fit, sized to the maximum window and node budget. The buffers are allocated once with the capacities below and reused across fits by clearing in place, so the training path does not allocate after the first fit. The queue holds owned sample vectors per node; those vectors are still allocated per node, but the major buffers (weights, sorted, left/right) are reused. This keeps the 60s training free of steady-state allocations while preserving the exact CART logic.

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§weights: Vec<f64>§sorted: Vec<(TreeSample, f64)>§left: Vec<(TreeSample, f64)>§right: Vec<(TreeSample, f64)>§nodes: Vec<TreeNode>§queue: VecDeque<NodeSpec>§preds: Vec<u64>§actuals: Vec<u64>§ema_preds: Vec<u64>§weights_full: Vec<f64>

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impl FitScratch

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pub fn new() -> Self

Create a scratch arena with capacities for the maximum window.

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impl Default for FitScratch

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fn default() -> Self

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