/**
 * Heuristic: detect incompressible (high-entropy) data.
 *
 * This is a performance optimization: if data looks random, DEFLATE usually
 * wastes CPU and may even produce slightly larger output.
 */
export declare function isProbablyIncompressible(data: Uint8Array, options?: {
    sampleBytes?: number;
    minDecisionBytes?: number;
}): boolean;
/**
 * Chunk-oriented variant of `isProbablyIncompressible()`.
 *
 * Useful for true streaming paths where sampling should avoid allocating and copying
 * a contiguous buffer (e.g. `ZipDeflateFile` smart-store decision).
 */
export declare function isProbablyIncompressibleChunks(chunks: Iterable<Uint8Array>, options?: {
    sampleBytes?: number;
    minDecisionBytes?: number;
}): boolean;