diff --git a/tests/utils/perf.js b/tests/utils/perf.js
new file mode 100644
index 0000000..51a2204
--- /dev/null
+++ b/tests/utils/perf.js
@@ -0,0 +1,40 @@
+import generateResponsiveObject from '../../src/utils/generateResponsiveObject'
+import generateResponsiveStyles from '../../src/utils/generateResponsiveStyles'
+
+const numCycles = 500
+const numProps = 15
+
+test('generateResponsiveObject Performance', () => {
+   const t0 = performance.now()
+   for (let i = 0; i < numCycles; i += 1) {
+      for (let j = 0; j < numProps; j += 1) {
+         generateResponsiveObject('500px[a-c] 600px[d] 900px[e] 1200px[f]')
+      }
+   }
+
+   const t1 = performance.now()
+   console.log(t1 - t0)
+})
+
+test('generateResponsiveStyles Performance', () => {
+   const responsiveObject = {
+      fontFamily: {
+         a: 'Arial',
+         b: 'Helvetica'
+      },
+      color: {
+         a: 'red',
+         c: 'blue'
+      }
+   }
+
+   const t0 = performance.now()
+   for (let i = 0; i < numCycles; i += 1) {
+      for (let j = 0; j < numProps; j += 1) {
+         generateResponsiveStyles(responsiveObject)
+      }
+   }
+
+   const t1 = performance.now()
+   console.log(t1 - t0)
+})