export declare const average: (values: number[]) => number | null;
export declare const percentile: (values: number[], fraction: number) => number | null;
export declare const sum: (values: number[]) => number;
export declare const pushBoundedValue: (values: number[], value: number, maxSize: number) => number[];
type P2QuantileState = {
    readonly quantile: number;
    count: number;
    initialSamples: number[];
    markerHeights: number[];
    markerPositions: number[];
    desiredPositions: number[];
    desiredIncrements: number[];
};
export type StreamingSampleStats = {
    count: number;
    sum: number;
    last: number | null;
    min: number | null;
    max: number | null;
    p95: P2QuantileState;
};
export declare const createStreamingSampleStats: () => StreamingSampleStats;
export declare const cloneStreamingSampleStats: (state: StreamingSampleStats) => StreamingSampleStats;
export declare const recordStreamingSample: (state: StreamingSampleStats, value: number) => StreamingSampleStats;
export declare const averageFromStreamingSampleStats: (state: StreamingSampleStats) => number | null;
export declare const p95FromStreamingSampleStats: (state: StreamingSampleStats) => number | null;
export {};
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