diff --git a/perf/Set.js b/perf/Set.js
new file mode 100644
index 0000000000..c8770ad316
--- /dev/null
+++ b/perf/Set.js
@@ -0,0 +1,84 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+describe('Set', () => {
+  describe('maps with changes', () => {
+    const array2 = [];
+    for (let i = 0; i < 2; i++) {
+      array2[i] = i;
+    }
+    const set2 = Immutable.Set(array2);
+    it('of 2', () => {
+      set2.map((value) => value + 1);
+    });
+
+    const array8 = [];
+    for (let i = 0; i < 8; i++) {
+      array8[i] = i;
+    }
+    const set8 = Immutable.Set(array8);
+    it('of 8', () => {
+      set8.map((value) => value + 1);
+    });
+
+    const array32 = [];
+    for (let i = 0; i < 32; i++) {
+      array32[i] = i;
+    }
+    const set32 = Immutable.Set(array32);
+    it('of 32', () => {
+      set32.map((value) => value + 1);
+    });
+
+    const array1024 = [];
+    for (let i = 0; i < 1024; i++) {
+      array1024[i] = i;
+    }
+    const set1024 = Immutable.Set(array1024);
+    it('of 1024', () => {
+      set1024.map((value) => value + 1);
+    });
+  });
+
+  describe('maps without changes', () => {
+    const array2 = [];
+    for (let i = 0; i < 2; i++) {
+      array2[i] = i;
+    }
+    const set2 = Immutable.Set(array2);
+    it('of 2', () => {
+      set2.map((value) => value);
+    });
+
+    const array8 = [];
+    for (let i = 0; i < 8; i++) {
+      array8[i] = i;
+    }
+    const set8 = Immutable.Set(array8);
+    it('of 8', () => {
+      set8.map((value) => value);
+    });
+
+    const array32 = [];
+    for (let i = 0; i < 32; i++) {
+      array32[i] = i;
+    }
+    const set32 = Immutable.Set(array32);
+    it('of 32', () => {
+      set32.map((value) => value);
+    });
+
+    const array1024 = [];
+    for (let i = 0; i < 1024; i++) {
+      array1024[i] = i;
+    }
+    const set1024 = Immutable.Set(array1024);
+    it('of 1024', () => {
+      set1024.map((value) => value);
+    });
+  });
+});
diff --git a/perf/fromJS.js b/perf/fromJS.js
new file mode 100644
index 0000000000..ea844bdf3d
--- /dev/null
+++ b/perf/fromJS.js
@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+describe('fromJS', () => {
+  const list = Immutable.List();
+  it('List', () => {
+    Immutable.fromJS(list);
+  });
+
+  const object = { foo: 'bar' };
+  it('object', () => {
+    Immutable.fromJS(object);
+  });
+
+  describe('array of Lists', () => {
+    const array2 = [];
+    for (let i = 0; i < 2; i++) {
+      array2[i] = Immutable.List();
+    }
+    it('of 2', () => {
+      Immutable.fromJS(array2);
+    });
+
+    const array8 = [];
+    for (let i = 0; i < 8; i++) {
+      array8[i] = Immutable.List();
+    }
+    it('of 8', () => {
+      Immutable.fromJS(array8);
+    });
+
+    const array32 = [];
+    for (let i = 0; i < 32; i++) {
+      array32[i] = Immutable.List();
+    }
+    it('of 32', () => {
+      Immutable.fromJS(array32);
+    });
+
+    const array1024 = [];
+    for (let i = 0; i < 1024; i++) {
+      array1024[i] = i;
+    }
+    it('of 1024', () => {
+      Immutable.fromJS(array1024);
+    });
+  });
+});
diff --git a/perf/hash.js b/perf/hash.js
new file mode 100644
index 0000000000..d3c4edbf59
--- /dev/null
+++ b/perf/hash.js
@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+describe('hash', () => {
+  const aString = 'test';
+  it('a string', () => {
+    Immutable.hash(aString);
+  });
+
+  const aNumber = 5;
+  it('a number', () => {
+    Immutable.fromJS(aNumber);
+  });
+
+  const aNull = null;
+  it('null', () => {
+    Immutable.hash(aNull);
+  });
+
+  const anUndefined = undefined;
+  it('undefined', () => {
+    Immutable.hash(anUndefined);
+  });
+
+  const aBoolean = true;
+  it('a boolean', () => {
+    Immutable.hash(aBoolean);
+  });
+
+  const anObject = {};
+  it('an object', () => {
+    Immutable.hash(anObject);
+  });
+
+  const anArray = [];
+  it('an array', () => {
+    Immutable.hash(anArray);
+  });
+
+  const aFunction = () => null;
+  it('a function', () => {
+    Immutable.hash(aFunction);
+  });
+});
diff --git a/perf/toJS.js b/perf/toJS.js
index 049b7bafde..48898b8228 100644
--- a/perf/toJS.js
+++ b/perf/toJS.js
@@ -13,7 +13,7 @@ describe('toJS', () => {
   const list = Immutable.List(array32);
 
   it('List of 32', () => {
-    Immutable.toJS(list);
+    list.toJS(list);
   });
 
   const obj32 = {};
@@ -23,6 +23,6 @@ describe('toJS', () => {
   const map = Immutable.Map(obj32);
 
   it('Map of 32', () => {
-    Immutable.toJS(map);
+    map.toJS(map);
   });
 });