diff --git a/README.md b/README.md
index 5f23dba..5a10ff5 100644
--- a/README.md
+++ b/README.md
@@ -11,14 +11,18 @@ If you need any additional functionality or further documentation, please see th
 
 ### Benchmark Results
 
+Note that the benchmark results of this fork are slower than upstream due to the added vinculum notation support.
+This benchmark tests the highest supported integer (3,999,999) while upstream tests with 3,999.
+
 ```sh
 goos: linux
 goarch: amd64
 pkg: github.com/rwinkhart/convertroman
 cpu: AMD Ryzen 9 3900X 12-Core Processor
-BenchmarkFromInt-24    	61993154	        20.82 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFromInt-24           	 5372720	       237.0 ns/op	      24 B/op	       1 allocs/op
+BenchmarkFromIntCapital-24    	 2117424	       570.9 ns/op	      64 B/op	       3 allocs/op
 PASS
-ok  	github.com/rwinkhart/convertroman	1.827s
+ok  	github.com/rwinkhart/convertroman	4.098s
 ```
 
 ### Example
diff --git a/convertroman_test.go b/convertroman_test.go
index 8d4100e..c1d66ec 100644
--- a/convertroman_test.go
+++ b/convertroman_test.go
@@ -45,6 +45,13 @@ func TestFromInt(t *testing.T) {
 func BenchmarkFromInt(b *testing.B) {
 	b.ReportAllocs()
 	for i := 0; i < b.N; i++ {
-		_ = FromInt(3999)
+		_ = FromInt(3999999)
+	}
+}
+
+func BenchmarkFromIntCapital(b *testing.B) {
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		_ = FromIntCapital(3999999)
 	}
 }