Index: node_modules/d3-hierarchy/src/treemap/binary.js
===================================================================
--- node_modules/d3-hierarchy/src/treemap/binary.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-hierarchy/src/treemap/binary.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,46 @@
+export default function(parent, x0, y0, x1, y1) {
+  var nodes = parent.children,
+      i, n = nodes.length,
+      sum, sums = new Array(n + 1);
+
+  for (sums[0] = sum = i = 0; i < n; ++i) {
+    sums[i + 1] = sum += nodes[i].value;
+  }
+
+  partition(0, n, parent.value, x0, y0, x1, y1);
+
+  function partition(i, j, value, x0, y0, x1, y1) {
+    if (i >= j - 1) {
+      var node = nodes[i];
+      node.x0 = x0, node.y0 = y0;
+      node.x1 = x1, node.y1 = y1;
+      return;
+    }
+
+    var valueOffset = sums[i],
+        valueTarget = (value / 2) + valueOffset,
+        k = i + 1,
+        hi = j - 1;
+
+    while (k < hi) {
+      var mid = k + hi >>> 1;
+      if (sums[mid] < valueTarget) k = mid + 1;
+      else hi = mid;
+    }
+
+    if ((valueTarget - sums[k - 1]) < (sums[k] - valueTarget) && i + 1 < k) --k;
+
+    var valueLeft = sums[k] - valueOffset,
+        valueRight = value - valueLeft;
+
+    if ((x1 - x0) > (y1 - y0)) {
+      var xk = value ? (x0 * valueRight + x1 * valueLeft) / value : x1;
+      partition(i, k, valueLeft, x0, y0, xk, y1);
+      partition(k, j, valueRight, xk, y0, x1, y1);
+    } else {
+      var yk = value ? (y0 * valueRight + y1 * valueLeft) / value : y1;
+      partition(i, k, valueLeft, x0, y0, x1, yk);
+      partition(k, j, valueRight, x0, yk, x1, y1);
+    }
+  }
+}