2 files changed, 16 insertions, 1 deletions
diff --git a/x509roots/fallback/fallback.go b/x509roots/fallback/fallback.go
index 0f0e3a9..e4b5339 100644
--- a/x509roots/fallback/fallback.go
+++ b/x509roots/fallback/fallback.go
@@ -26,6 +26,10 @@ import (
 )
 
 func init() {
+	x509.SetFallbackRoots(newFallbackCertPool())
+}
+
+func newFallbackCertPool() *x509.CertPool {
 	p := x509.NewCertPool()
 	for _, c := range mustParse(unparsedCertificates) {
 		if len(c.constraints) == 0 {
@@ -41,7 +45,7 @@ func init() {
 			})
 		}
 	}
-	x509.SetFallbackRoots(p)
+	return p
 }
 
 type unparsedCertificate struct {
diff --git a/x509roots/fallback/fallback_test.go b/x509roots/fallback/fallback_test.go
new file mode 100644
index 0000000..e380046
--- /dev/null
+++ b/x509roots/fallback/fallback_test.go
@@ -0,0 +1,11 @@
+package fallback
+
+import "testing"
+
+// BenchmarkInitTime benchmarks the time it takes to parse all certificates
+// in this bundle, it corresponds to the init time of this package.
+func BenchmarkInitTime(b *testing.B) {
+	for range b.N {
+		newFallbackCertPool()
+	}
+}