/** Opt-in counters for controlled codebase-index performance measurements. */
export interface CodebaseIndexPerfSnapshot {
    filesystemBytesRead: number;
    filesystemReadCount: number;
    parserGateWaitMs: number;
    parserGateCalls: number;
    parserSubprocessCount: number;
    ipcPendingPeak: number;
    writeQueueWaitMs: number;
    writeQueueCalls: number;
}
export declare function resetCodebaseIndexPerfMetrics(): void;
export declare function getCodebaseIndexPerfSnapshot(): CodebaseIndexPerfSnapshot;
export declare function recordFilesystemRead(bytes: number): void;
export declare function recordParserGateWait(waitMs: number): void;
export declare function recordParserSubprocess(): void;
export declare function recordIpcPending(depth: number): void;
export declare function recordWriteQueueWait(waitMs: number): void;
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