import { BuildFeatureType } from '../build/bundler/definitions';
/**
 * Initializes the build metrics state and records build start for all features.
 * Call at dev server start.
 */
export declare function initBuildMetrics(): void;
/**
 * Records the start time of a build for a given feature type.
 * The first completed build for each feature will be tagged as "initial",
 * all subsequent builds as "rebuild".
 *
 * If no build has completed yet and a start time is already pending
 * (i.e., the initial build start was recorded at dev server start),
 * the existing start time is preserved.
 *
 * @param feature The BuildFeatureType being built
 * @param offsetMs Optional offset in milliseconds. If provided, the start time will be set to (now - offsetMs).
 */
export declare function recordBuildStart(feature: BuildFeatureType, offsetMs?: number): void;
/**
 * Records the end time of a build for a given feature type.
 * Automatically determines the build type: if no build has been completed yet
 * for this feature, it is tagged as "initial"; otherwise as "rebuild".
 * @param feature The BuildFeatureType being built
 */
export declare function recordBuildEnd(feature: BuildFeatureType): void;
/**
 * Reports all collected build and rebuild metrics as bizevents.
 * All build times are reported in seconds, rounded to 3 decimal places.
 * Initial builds are reported separately from rebuild statistics.
 * Rebuild statistics (min, max, avg, median and count) exclude the initial build.
 */
export declare function reportBuildMetrics(): void;
/**
 * Converts a duration in milliseconds to seconds, rounded to 3 decimal places.
 * @param ms Duration in milliseconds
 * @returns Duration in seconds, rounded to 3 decimals
 */
export declare function msToSecRounded(ms: number): number;