syscallcompat: add Lgetxattr benchmark

1 files changed, 8 insertions, 0 deletions

diff --git a/internal/syscallcompat/sys_common_test.go b/internal/syscallcompat/sys_common_test.go
index bbb6dbc..f53b0d2 100644
--- a/internal/syscallcompat/sys_common_test.go
+++ b/internal/syscallcompat/sys_common_test.go
@@ -313,3 +313,11 @@ func TestFstatat(t *testing.T) {
 		t.Errorf("symlink size: expected=%d, got=%d", expectedSize, st.Size)
 	}
 }
+
+// BenchmarkLgetxattr benchmarks Lgetxattr. Lgetxattr is very hot as the kernel
+// queries security.capabilities for every file access.
+func BenchmarkLgetxattr(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		Lgetxattr("/", "this.attr.does.not.exist")
+	}
+}