/**
 * Maximum number of closePath operations to accumulate before flushing
 * the canvas path with stroke(). This prevents superlinear rasterization
 * costs when gap data produces thousands of single-point segments.
 */
export declare const PATH_BATCH_SIZE = 1000;
/**
 * Maximum number of arc operations to accumulate in a scatter dot loop
 * before flushing with fill(). Same rationale as PATH_BATCH_SIZE.
 */
export declare const ARC_BATCH_SIZE = 1000;
/**
 * Creates a lightweight path context wrapper that periodically flushes the
 * accumulated canvas path by calling `stroke() + beginPath()` after a
 * threshold number of `closePath()` calls.
 *
 * d3-shape calls `closePath()` for every single-point segment when gap data
 * produces alternating defined/undefined patterns. Accumulating tens of
 * thousands of sub-paths in one `beginPath()→stroke()` cycle causes
 * superlinear rasterization cost. This wrapper breaks that accumulation
 * into manageable batches.
 *
 * The wrapper only flushes on `closePath()` boundaries, which mark the end
 * of a complete sub-path — so no visual artifacts are produced.
 *
 * @param ctx - The real canvas rendering context (must have stroke styles set before use)
 * @param batchSize - Number of closePath calls before flushing
 */
export declare function createBatchedStrokeContext(ctx: CanvasRenderingContext2D, batchSize: number): CanvasRenderingContext2D;