diff --git a/benchmark/Benchmark.cpp b/benchmark/Benchmark.cpp
index c63b9e78..e9523426 100644
--- a/benchmark/Benchmark.cpp
+++ b/benchmark/Benchmark.cpp
@@ -10,22 +10,344 @@
 #include <filesystem>
 #include <fstream>
 
+#include <nlohmann/json.hpp>
+#include <yoga/Yoga.h>
 #include <yoga/benchmark/Benchmark.h>
 #include <yoga/debug/NodeToString.h>
 #include <yoga/enums/PrintOptions.h>
 
 namespace facebook::yoga {
 
+using namespace nlohmann;
+
+std::string parentPath() {
+  std::filesystem::path currentPath = __FILE__;
+  return currentPath.parent_path().string();
+}
+
+std::filesystem::path capturePath(std::string captureName) {
+  return parentPath() + "/captures/" + captureName + ".json";
+}
+
 void captureTree(const Node* node, std::string captureName) {
   std::string str;
   nodeToString(str, node, PrintOptions::Style | PrintOptions::Children);
-  std::filesystem::path currentPath = __FILE__;
-  std::ofstream file;
-  file.open(
-      currentPath.parent_path().string() + "/captures/" + captureName +
-      ".json");
-  file << str;
-  file.close();
+  std::ofstream captureFile(capturePath(captureName));
+  captureFile << str;
+  captureFile.close();
+}
+
+std::string invalidArgumentMessage(std::string arg, std::string enumName) {
+  return arg + " does not represent any " + enumName + " values";
+}
+
+YGFlexDirection flexDirectionFromString(std::string str) {
+  if (str == "row") {
+    return YGFlexDirectionRow;
+  } else if (str == "row-reverse") {
+    return YGFlexDirectionRowReverse;
+  } else if (str == "column") {
+    return YGFlexDirectionColumn;
+  } else if (str == "column-reverse") {
+    return YGFlexDirectionColumnReverse;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGFlexDirection"));
+  }
+}
+
+YGJustify justifyContentFromString(std::string str) {
+  if (str == "flex-start") {
+    return YGJustifyFlexStart;
+  } else if (str == "center") {
+    return YGJustifyCenter;
+  } else if (str == "flex-end") {
+    return YGJustifyFlexEnd;
+  } else if (str == "space-between") {
+    return YGJustifySpaceBetween;
+  } else if (str == "space-around") {
+    return YGJustifySpaceAround;
+  } else if (str == "space-evenly") {
+    return YGJustifySpaceEvenly;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGJustify"));
+  }
+}
+
+YGAlign alignFromString(std::string str) {
+  if (str == "auto") {
+    return YGAlignAuto;
+  } else if (str == "flex-start") {
+    return YGAlignFlexStart;
+  } else if (str == "center") {
+    return YGAlignCenter;
+  } else if (str == "flex-end") {
+    return YGAlignFlexEnd;
+  } else if (str == "stretch") {
+    return YGAlignStretch;
+  } else if (str == "baseline") {
+    return YGAlignBaseline;
+  } else if (str == "space-between") {
+    return YGAlignSpaceBetween;
+  } else if (str == "space-around") {
+    return YGAlignSpaceAround;
+  } else if (str == "space-evenly") {
+    return YGAlignSpaceEvenly;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGAlign"));
+  }
+}
+
+YGWrap wrapFromString(std::string str) {
+  if (str == "no-wrap") {
+    return YGWrapNoWrap;
+  } else if (str == "wrap") {
+    return YGWrapWrap;
+  } else if (str == "wrap-reverse") {
+    return YGWrapWrapReverse;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGAlign"));
+  }
+}
+
+YGOverflow overflowFromString(std::string str) {
+  if (str == "visible") {
+    return YGOverflowVisible;
+  } else if (str == "hidden") {
+    return YGOverflowHidden;
+  } else if (str == "scroll") {
+    return YGOverflowScroll;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGAlign"));
+  }
+}
+
+YGDisplay displayFromString(std::string str) {
+  if (str == "flex") {
+    return YGDisplayFlex;
+  } else if (str == "none") {
+    return YGDisplayNone;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGAlign"));
+  }
+}
+
+YGPositionType positionTypeFromString(std::string str) {
+  if (str == "static") {
+    return YGPositionTypeStatic;
+  } else if (str == "relative") {
+    return YGPositionTypeRelative;
+  } else if (str == "absolute") {
+    return YGPositionTypeAbsolute;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGAlign"));
+  }
+}
+
+bool isAuto(json& j) {
+  return j.is_string() && j == "auto";
+}
+
+YGUnit unitFromJson(json& j) {
+  if (isAuto(j)) {
+    return YGUnitAuto;
+  }
+
+  std::string unit = j["unit"];
+  if (unit == "px") {
+    return YGUnitPoint;
+  } else if (unit == "\%") {
+    return YGUnitPercent;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(unit, "YGUnit"));
+  }
+}
+
+YGEdge edgeFromString(std::string str) {
+  if (str == "left") {
+    return YGEdgeLeft;
+  } else if (str == "top") {
+    return YGEdgeTop;
+  } else if (str == "right") {
+    return YGEdgeRight;
+  } else if (str == "bottom") {
+    return YGEdgeBottom;
+  } else if (str == "start") {
+    return YGEdgeStart;
+  } else if (str == "end") {
+    return YGEdgeEnd;
+  } else if (str == "horizontal") {
+    return YGEdgeHorizontal;
+  } else if (str == "vertical") {
+    return YGEdgeVertical;
+  } else if (str == "all") {
+    return YGEdgeAll;
+  } else {
+    throw std::invalid_argument(invalidArgumentMessage(str, "YGEdge"));
+  }
+}
+
+std::string edgeStringFromPropertyName(
+    json::iterator it,
+    std::string propertyName) {
+  return it.key().substr(propertyName.length() + 1);
+}
+
+YGNodeRef buildTreeFromJson(json& j, YGNodeRef parent, size_t index) {
+  const YGNodeRef node = YGNodeNew();
+  if (parent != nullptr) {
+    YGNodeInsertChild(parent, node, index);
+  }
+
+  json style = j["style"];
+  for (json::iterator it = style.begin(); it != style.end(); it++) {
+    if (it.key() == "flex-direction") {
+      YGNodeStyleSetFlexDirection(node, flexDirectionFromString(it.value()));
+    } else if (it.key() == "justify-content") {
+      YGNodeStyleSetJustifyContent(node, justifyContentFromString(it.value()));
+    } else if (it.key() == "align-items") {
+      YGNodeStyleSetAlignItems(node, alignFromString(it.value()));
+    } else if (it.key() == "align-content") {
+      YGNodeStyleSetAlignContent(node, alignFromString(it.value()));
+    } else if (it.key() == "align-self") {
+      YGNodeStyleSetAlignSelf(node, alignFromString(it.value()));
+    } else if (it.key() == "flex-wrap") {
+      YGNodeStyleSetFlexWrap(node, wrapFromString(it.value()));
+    } else if (it.key() == "overflow") {
+      YGNodeStyleSetOverflow(node, overflowFromString(it.value()));
+    } else if (it.key() == "display") {
+      YGNodeStyleSetDisplay(node, displayFromString(it.value()));
+    } else if (it.key() == "position-type") {
+      YGNodeStyleSetPositionType(node, positionTypeFromString(it.value()));
+    } else if (it.key() == "flex-grow") {
+      YGNodeStyleSetFlexGrow(node, it.value());
+    } else if (it.key() == "flex-shrink") {
+      YGNodeStyleSetFlexShrink(node, it.value());
+    } else if (it.key() == "flex") {
+      YGNodeStyleSetFlex(node, it.value());
+    } else if (it.key() == "flex-basis") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitAuto) {
+        YGNodeStyleSetFlexBasisAuto(node);
+      } else if (unit == YGUnitPoint) {
+        YGNodeStyleSetFlexBasis(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetFlexBasisPercent(node, it.value()["value"]);
+      }
+    } else if (it.key().starts_with("position")) {
+      YGEdge edge = edgeFromString(edgeStringFromPropertyName(it, "position"));
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetPosition(node, edge, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetPositionPercent(node, edge, it.value()["value"]);
+      }
+    } else if (it.key().starts_with("padding")) {
+      YGEdge edge = edgeFromString(edgeStringFromPropertyName(it, "padding"));
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetPadding(node, edge, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetPaddingPercent(node, edge, it.value()["value"]);
+      }
+    } else if (it.key().starts_with("border")) {
+      YGEdge edge = edgeFromString(edgeStringFromPropertyName(it, "border"));
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetBorder(node, edge, it.value()["value"]);
+      }
+    } else if (it.key().starts_with("margin")) {
+      YGEdge edge = edgeFromString(edgeStringFromPropertyName(it, "margin"));
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetMargin(node, edge, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetMarginPercent(node, edge, it.value()["value"]);
+      } else if (unit == YGUnitAuto) {
+        YGNodeStyleSetMarginAuto(node, edge);
+      }
+    } else if (it.key() == "gap") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetGap(node, YGGutterAll, it.value()["value"]);
+      }
+    } else if (it.key() == "column-gap") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetGap(node, YGGutterColumn, it.value()["value"]);
+      }
+    } else if (it.key() == "row-gap") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetGap(node, YGGutterRow, it.value()["value"]);
+      }
+    } else if (it.key() == "height") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitAuto) {
+        YGNodeStyleSetHeightAuto(node);
+      } else if (unit == YGUnitPoint) {
+        YGNodeStyleSetHeight(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetHeightPercent(node, it.value()["value"]);
+      }
+    } else if (it.key() == "width") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitAuto) {
+        YGNodeStyleSetWidthAuto(node);
+      } else if (unit == YGUnitPoint) {
+        YGNodeStyleSetWidth(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetWidthPercent(node, it.value()["value"]);
+      }
+    } else if (it.key() == "min-height") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetMinHeight(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetMinHeightPercent(node, it.value()["value"]);
+      }
+    } else if (it.key() == "min-width") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetMinWidth(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetMinWidthPercent(node, it.value()["value"]);
+      }
+    } else if (it.key() == "max-height") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetMaxHeight(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetMaxHeightPercent(node, it.value()["value"]);
+      }
+    } else if (it.key() == "max-width") {
+      YGUnit unit = unitFromJson(it.value());
+      if (unit == YGUnitPoint) {
+        YGNodeStyleSetMaxWidth(node, it.value()["value"]);
+      } else if (unit == YGUnitPercent) {
+        YGNodeStyleSetMaxWidthPercent(node, it.value()["value"]);
+      }
+    }
+  }
+
+  json children = j["children"];
+  size_t childIndex = 0;
+  for (json child : children) {
+    buildTreeFromJson(child, node, childIndex);
+    childIndex++;
+  }
+
+  return node;
+}
+
+void generateBenchmark(std::string captureName) {
+  std::ifstream captureFile(capturePath(captureName));
+  json capture = json::parse(captureFile);
+
+  YGNodeRef root = buildTreeFromJson(capture, nullptr, 0 /*index*/);
+
+  YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+
+  YGNodeFreeRecursive(root);
 }
 
 } // namespace facebook::yoga
diff --git a/benchmark/Benchmark.h b/benchmark/Benchmark.h
index 84d1af49..51ec2b23 100644
--- a/benchmark/Benchmark.h
+++ b/benchmark/Benchmark.h
@@ -15,5 +15,7 @@ namespace facebook::yoga {
 
 void captureTree(const Node* node, std::string captureName);
 
+void generateBenchmark(std::string captureName);
+
 } // namespace facebook::yoga
 #endif
diff --git a/yoga/debug/NodeToString.cpp b/yoga/debug/NodeToString.cpp
index 854e2fcf..598176c5 100644
--- a/yoga/debug/NodeToString.cpp
+++ b/yoga/debug/NodeToString.cpp
@@ -33,7 +33,7 @@ static void appendNumberIfNotUndefined(
     const Style::Length& number) {
   if (number.unit() != Unit::Undefined) {
     if (number.unit() == Unit::Auto) {
-      j["style"][key]["unit"] = "auto";
+      j["style"][key] = "auto";
     } else {
       std::string unit = number.unit() == Unit::Point ? "px" : "%%";
       j["style"][key]["value"] = number.value().unwrap();
@@ -106,7 +106,7 @@ nodeToStringImpl(json& j, const yoga::Node* node, PrintOptions options) {
       j["style"]["display"] = toString(style.display());
     }
     if (style.positionType() != yoga::Style{}.positionType()) {
-      j["style"]["position"] = toString(style.positionType());
+      j["style"]["position-type"] = toString(style.positionType());
     }
 
     appendFloatOptionalIfDefined(j, "flex-grow", style.flexGrow());