diff --git a/benchmarks/assign.async.js b/benchmarks/assign.async.js
index 01842424..9c81121a 100644
--- a/benchmarks/assign.async.js
+++ b/benchmarks/assign.async.js
@@ -3,6 +3,14 @@ const assign = require('../assign')
 
 const suite = new TimeInLoopSuite({ async: true, loopCount: 1e5 })
 
+suite.add('rubico assign async values', async () => {
+  await assign({}, {
+    a: Promise.resolve(1),
+    b: Promise.resolve(2),
+    c: Promise.resolve(3),
+  })
+})
+
 suite.add('rubico assign', async () => {
   await assign({}, {
     a: async () => 1,
diff --git a/benchmarks/assign.js b/benchmarks/assign.js
index ee8487b0..ae3a4e02 100644
--- a/benchmarks/assign.js
+++ b/benchmarks/assign.js
@@ -3,6 +3,14 @@ const assign = require('../assign')
 
 const suite = new TimeInLoopSuite()
 
+suite.add('rubico assign values', () => {
+  assign({}, {
+    a: 1,
+    b: 2,
+    c: 3,
+  })
+})
+
 suite.add('rubico assign', () => {
   assign({}, {
     a: () => 1,