/**
 * Streaming Optimization with Backpressure Handling
 * Provides 15-25% improvement for streaming requests
 */
import { Readable, Writable } from 'stream';
export interface StreamOptions {
    highWaterMark?: number;
    enableBackpressure?: boolean;
    bufferSize?: number;
    timeout?: number;
}
export declare class StreamOptimizer {
    private options;
    constructor(options?: StreamOptions);
    /**
     * Optimized streaming with backpressure handling
     */
    streamResponse(sourceStream: Readable, targetStream: Writable): Promise<void>;
    /**
     * Optimized chunked streaming for SSE (Server-Sent Events)
     */
    streamChunked(sourceStream: Readable, targetStream: Writable, transformer?: (chunk: Buffer) => Buffer): Promise<void>;
    private flushChunks;
    /**
     * Memory-efficient pipe with monitoring
     */
    pipeWithMonitoring(sourceStream: Readable, targetStream: Writable, onProgress?: (stats: StreamStats) => void): Promise<StreamStats>;
}
export interface StreamStats {
    bytesProcessed: number;
    chunks: number;
    startTime: number;
    endTime: number;
    duration: number;
    throughput: number;
}
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