diff --git a/kernel/driver.cc b/kernel/driver.cc
index d76841909..3c9575f57 100644
--- a/kernel/driver.cc
+++ b/kernel/driver.cc
@@ -725,6 +725,10 @@ int main(int argc, char **argv)
 			total_ns += gc_ns;
 			timedat.insert(make_tuple(gc_ns,
 					RTLIL::OwningIdString::garbage_collection_count(), "id_gc"));
+			total_ns += signorm_ns;
+			timedat.insert(make_tuple(signorm_ns, signorm_count, "signorm"));
+			total_ns += signorm_restore_ns;
+			timedat.insert(make_tuple(signorm_restore_ns, signorm_restore_count, "signorm_restore"));
 		}
 
 		if (timing_details)
diff --git a/kernel/rtlil.h b/kernel/rtlil.h
index cf146f786..0ef21529a 100644
--- a/kernel/rtlil.h
+++ b/kernel/rtlil.h
@@ -129,6 +129,12 @@ namespace RTLIL
 	struct PortBit;
 };
 
+// TODO clean up?
+extern int64_t signorm_ns;
+extern int signorm_count;
+extern int64_t signorm_restore_ns;
+extern int signorm_restore_count;
+
 struct RTLIL::IdString
 {
 	struct Storage {
diff --git a/kernel/rtlil_bufnorm.cc b/kernel/rtlil_bufnorm.cc
index a3a53ae93..359ca298f 100644
--- a/kernel/rtlil_bufnorm.cc
+++ b/kernel/rtlil_bufnorm.cc
@@ -233,6 +233,7 @@ struct RTLIL::SigNormIndex
 	}
 
 	void restore_connections() {
+		int64_t start = PerformanceTimer::query();
 		flush_connections();
 		pool<Wire *> wires;
 		for (auto const &bit : sigmap.database)
@@ -260,6 +261,11 @@ struct RTLIL::SigNormIndex
 		}
 
 		restored_connections = module->connections_.size();
+
+		int64_t time_ns = PerformanceTimer::query() - start;
+		Pass::subtract_from_current_runtime_ns(time_ns);
+		signorm_restore_ns += time_ns;
+		++signorm_restore_count;
 	}
 };
 
@@ -316,6 +322,10 @@ void RTLIL::Design::bufNormalize(bool enable)
 		module->bufNormalize();
 }
 
+int64_t signorm_ns;
+int signorm_count;
+int64_t signorm_restore_ns;
+int signorm_restore_count;
 void RTLIL::Design::sigNormalize(bool enable)
 {
 	if (!enable)
@@ -357,8 +367,13 @@ void RTLIL::Design::sigNormalize(bool enable)
 		flagSigNormalized = true;
 	}
 
+	int64_t start = PerformanceTimer::query();
 	for (auto module : modules())
 		module->sigNormalize();
+	int64_t time_ns = PerformanceTimer::query() - start;
+	Pass::subtract_from_current_runtime_ns(time_ns);
+	signorm_ns += time_ns;
+	++signorm_count;
 }
 
 void RTLIL::Module::sigNormalize()