diff --git a/lib/pollfd.c b/lib/pollfd.c
index 25167dd5..80f47718 100644
--- a/lib/pollfd.c
+++ b/lib/pollfd.c
@@ -346,6 +346,7 @@ lws_callback_on_writable(struct lws *wsi)
 	struct lws *network_wsi, *wsi2;
 	int already;
 #endif
+	int n;
 
 	if (wsi->state == LWSS_SHUTDOWN)
 		return 0;
@@ -353,9 +354,16 @@ lws_callback_on_writable(struct lws *wsi)
 	if (wsi->socket_is_permanently_unusable)
 		return 0;
 
-	if (wsi->parent_carries_io) {
-		int n = lws_callback_on_writable(wsi->parent);
+	pt = &wsi->context->pt[(int)wsi->tsi];
 
+	if (wsi->parent_carries_io) {
+#if defined(LWS_WITH_STATS)
+		if (!wsi->active_writable_req_us) {
+			wsi->active_writable_req_us = time_in_microseconds();
+			lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB_EFF_REQ, 1);
+		}
+#endif
+		n = lws_callback_on_writable(wsi->parent);
 		if (n < 0)
 			return n;
 
@@ -363,7 +371,6 @@ lws_callback_on_writable(struct lws *wsi)
 		return 1;
 	}
 
-	pt = &wsi->context->pt[(int)wsi->tsi];
 	lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB_REQ, 1);
 #if defined(LWS_WITH_STATS)
 	if (!wsi->active_writable_req_us) {
diff --git a/lib/server.c b/lib/server.c
index b323951b..ba69a653 100644
--- a/lib/server.c
+++ b/lib/server.c
@@ -2433,7 +2433,7 @@ try_pollout:
 		if (wsi->mode == LWSCM_RAW) {
 			lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB, 1);
 #if defined(LWS_WITH_STATS)
-			{
+			if (wsi->active_writable_req_us) {
 				uint64_t ul = time_in_microseconds() - wsi->active_writable_req_us;
 
 				lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_MS_WRITABLE_DELAY, ul);
@@ -2458,7 +2458,7 @@ try_pollout:
 
 			lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB, 1);
 #if defined(LWS_WITH_STATS)
-			{
+			if (wsi->active_writable_req_us) {
 				uint64_t ul = time_in_microseconds() - wsi->active_writable_req_us;
 
 				lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_MS_WRITABLE_DELAY, ul);
diff --git a/lib/service.c b/lib/service.c
index 184ded08..b5b9200d 100644
--- a/lib/service.c
+++ b/lib/service.c
@@ -29,7 +29,7 @@ lws_calllback_as_writeable(struct lws *wsi)
 
 	lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_C_WRITEABLE_CB, 1);
 #if defined(LWS_WITH_STATS)
-	{
+	if (wsi->active_writable_req_us) {
 		uint64_t ul = time_in_microseconds() - wsi->active_writable_req_us;
 
 		lws_stats_atomic_bump(wsi->context, pt, LWSSTATS_MS_WRITABLE_DELAY, ul);