Function computeThreadColumnLayout

src/views/DataThread.tsx:2705–2719

* Compute a balanced column layout for threads. * * @param heights – Estimated pixel height for each thread (in display order). * @param numColumns – Maximum number of columns to distribute into. * @param flexOrder – When true, threads may be reordered across columns for * b

(
    heights: number[],
    numColumns: number,
    flexOrder: boolean = false,
)

 *          thread indices.  Empty columns are omitted.
 */
function computeThreadColumnLayout(
    heights: number[],
    numColumns: number,
    flexOrder: boolean = false,
): number[][] {
    if (heights.length === 0) return [];
    if (heights.length === 1) return [[0]];

    const cols = Math.min(numColumns, heights.length);
    if (cols <= 1) return [heights.map((_, i) => i)];

    return flexOrder
        ? layoutFlexOrder(heights, cols)
        : layoutPreserveOrder(heights, cols);
}

/**
 * Balanced layout *with* reordering (LPT – Longest Processing Time first).