diff --git a/distr/flecs.c b/distr/flecs.c
index 143d8d9508..082e6d1b22 100644
--- a/distr/flecs.c
+++ b/distr/flecs.c
@@ -14284,7 +14284,7 @@ void flecs_observer_invoke(
     bool match_this = query->flags & EcsQueryMatchThis;
     if (match_this) {
         callback(it);
-        query->eval_count ++;
+        ecs_os_inc(&query->eval_count);
     } else {
         ecs_entity_t observer_src = ECS_TERM_REF_ID(&term->src);
         if (observer_src && !(term->src.id & EcsIsEntity)) {
@@ -14300,7 +14300,7 @@ void flecs_observer_invoke(
             it->entities = &e;
             if (!observer_src) {
                 callback(it);
-                query->eval_count ++;
+                ecs_os_inc(&query->eval_count);
             } else if (observer_src == e) {
                 ecs_entity_t dummy = 0;
                 it->entities = &dummy;
@@ -14309,7 +14309,7 @@ void flecs_observer_invoke(
                 }
 
                 callback(it);
-                query->eval_count ++;
+                ecs_os_inc(&query->eval_count);
                 it->sources[0] = src;
                 break;
             }
@@ -52131,9 +52131,11 @@ int32_t flecs_run_pipeline_ops(
         ecs_system_t* sys = (ecs_system_t*)poly->poly;
 
         /* Keep track of the last frame for which the system has ran, so we
-        * know from where to resume the schedule in case the schedule
-        * changes during a merge. */
-        sys->last_frame = world->info.frame_count_total + 1;
+         * know from where to resume the schedule in case the schedule
+         * changes during a merge. */
+        if (stage_index == 0) {
+            sys->last_frame = world->info.frame_count_total + 1;
+        }
 
         ecs_stage_t* s = NULL;
         if (!op->immediate) {
@@ -52145,7 +52147,7 @@ int32_t flecs_run_pipeline_ops(
         flecs_run_intern(world, s, system, sys, stage_index,
             stage_count, delta_time, NULL);
 
-        world->info.systems_ran_frame++;
+        ecs_os_linc(&world->info.systems_ran_frame);
         ran_since_merge++;
 
         if (ran_since_merge == op->count) {
@@ -69889,7 +69891,7 @@ ecs_iter_t ecs_query_iter(
     }
 
     /* Ok, only for stats */
-    ECS_CONST_CAST(ecs_query_t*, q)->eval_count ++;
+    ecs_os_linc(&ECS_CONST_CAST(ecs_query_t*, q)->eval_count);
 
     ecs_query_impl_t *impl = flecs_query_impl(q);
     ecs_query_cache_t *cache = impl->cache;
diff --git a/distr/flecs.h b/distr/flecs.h
index 908542f3e1..d18eef7f51 100644
--- a/distr/flecs.h
+++ b/distr/flecs.h
@@ -73,6 +73,13 @@
  */
 // #define FLECS_ACCURATE_COUNTERS
 
+/** @def FLECS_DISABLE_COUNTERS
+ * Disables counters used for statistics. Improves performance, but
+ * will prevent some features that rely on statistics from working,
+ * like the statistics pages in the explorer.
+ */
+// #define FLECS_DISABLE_COUNTERS
+
 /* Make sure provided configuration is valid */
 #if defined(FLECS_DEBUG) && defined(FLECS_NDEBUG)
 #error "invalid configuration: cannot both define FLECS_DEBUG and FLECS_NDEBUG"
@@ -2707,6 +2714,7 @@ void ecs_os_set_api_defaults(void);
 #define ecs_os_now() ecs_os_api.now_()
 #define ecs_os_get_time(time_out) ecs_os_api.get_time_(time_out)
 
+#ifndef FLECS_DISABLE_COUNTERS
 #ifdef FLECS_ACCURATE_COUNTERS
 #define ecs_os_inc(v)  (ecs_os_ainc(v))
 #define ecs_os_linc(v) (ecs_os_lainc(v))
@@ -2718,6 +2726,13 @@ void ecs_os_set_api_defaults(void);
 #define ecs_os_dec(v)  (--(*v))
 #define ecs_os_ldec(v) (--(*v))
 #endif
+#else
+#define ecs_os_inc(v)
+#define ecs_os_linc(v)
+#define ecs_os_dec(v)
+#define ecs_os_ldec(v)
+#endif
+
 
 #ifdef ECS_TARGET_MINGW
 /* mingw bug: without this a conversion error is thrown, but isnan/isinf should
diff --git a/include/flecs.h b/include/flecs.h
index 16ab64c354..031f93c4b7 100644
--- a/include/flecs.h
+++ b/include/flecs.h
@@ -71,6 +71,13 @@
  */
 // #define FLECS_ACCURATE_COUNTERS
 
+/** @def FLECS_DISABLE_COUNTERS
+ * Disables counters used for statistics. Improves performance, but
+ * will prevent some features that rely on statistics from working,
+ * like the statistics pages in the explorer.
+ */
+// #define FLECS_DISABLE_COUNTERS
+
 /* Make sure provided configuration is valid */
 #if defined(FLECS_DEBUG) && defined(FLECS_NDEBUG)
 #error "invalid configuration: cannot both define FLECS_DEBUG and FLECS_NDEBUG"
diff --git a/include/flecs/os_api.h b/include/flecs/os_api.h
index c6dad4578a..2d2cb42bdb 100644
--- a/include/flecs/os_api.h
+++ b/include/flecs/os_api.h
@@ -517,6 +517,7 @@ void ecs_os_set_api_defaults(void);
 #define ecs_os_now() ecs_os_api.now_()
 #define ecs_os_get_time(time_out) ecs_os_api.get_time_(time_out)
 
+#ifndef FLECS_DISABLE_COUNTERS
 #ifdef FLECS_ACCURATE_COUNTERS
 #define ecs_os_inc(v)  (ecs_os_ainc(v))
 #define ecs_os_linc(v) (ecs_os_lainc(v))
@@ -528,6 +529,13 @@ void ecs_os_set_api_defaults(void);
 #define ecs_os_dec(v)  (--(*v))
 #define ecs_os_ldec(v) (--(*v))
 #endif
+#else
+#define ecs_os_inc(v)
+#define ecs_os_linc(v)
+#define ecs_os_dec(v)
+#define ecs_os_ldec(v)
+#endif
+
 
 #ifdef ECS_TARGET_MINGW
 /* mingw bug: without this a conversion error is thrown, but isnan/isinf should
diff --git a/src/addons/pipeline/pipeline.c b/src/addons/pipeline/pipeline.c
index 102a4750ec..f28fafc19d 100644
--- a/src/addons/pipeline/pipeline.c
+++ b/src/addons/pipeline/pipeline.c
@@ -560,9 +560,11 @@ int32_t flecs_run_pipeline_ops(
         ecs_system_t* sys = (ecs_system_t*)poly->poly;
 
         /* Keep track of the last frame for which the system has ran, so we
-        * know from where to resume the schedule in case the schedule
-        * changes during a merge. */
-        sys->last_frame = world->info.frame_count_total + 1;
+         * know from where to resume the schedule in case the schedule
+         * changes during a merge. */
+        if (stage_index == 0) {
+            sys->last_frame = world->info.frame_count_total + 1;
+        }
 
         ecs_stage_t* s = NULL;
         if (!op->immediate) {
@@ -574,7 +576,7 @@ int32_t flecs_run_pipeline_ops(
         flecs_run_intern(world, s, system, sys, stage_index,
             stage_count, delta_time, NULL);
 
-        world->info.systems_ran_frame++;
+        ecs_os_linc(&world->info.systems_ran_frame);
         ran_since_merge++;
 
         if (ran_since_merge == op->count) {
diff --git a/src/observer.c b/src/observer.c
index d073ccad6b..05a0d04b55 100644
--- a/src/observer.c
+++ b/src/observer.c
@@ -314,7 +314,7 @@ void flecs_observer_invoke(
     bool match_this = query->flags & EcsQueryMatchThis;
     if (match_this) {
         callback(it);
-        query->eval_count ++;
+        ecs_os_inc(&query->eval_count);
     } else {
         ecs_entity_t observer_src = ECS_TERM_REF_ID(&term->src);
         if (observer_src && !(term->src.id & EcsIsEntity)) {
@@ -330,7 +330,7 @@ void flecs_observer_invoke(
             it->entities = &e;
             if (!observer_src) {
                 callback(it);
-                query->eval_count ++;
+                ecs_os_inc(&query->eval_count);
             } else if (observer_src == e) {
                 ecs_entity_t dummy = 0;
                 it->entities = &dummy;
@@ -339,7 +339,7 @@ void flecs_observer_invoke(
                 }
 
                 callback(it);
-                query->eval_count ++;
+                ecs_os_inc(&query->eval_count);
                 it->sources[0] = src;
                 break;
             }
diff --git a/src/query/engine/eval_iter.c b/src/query/engine/eval_iter.c
index 1c128fe93e..052955dda1 100644
--- a/src/query/engine/eval_iter.c
+++ b/src/query/engine/eval_iter.c
@@ -372,7 +372,7 @@ ecs_iter_t ecs_query_iter(
     }
 
     /* Ok, only for stats */
-    ECS_CONST_CAST(ecs_query_t*, q)->eval_count ++;
+    ecs_os_linc(&ECS_CONST_CAST(ecs_query_t*, q)->eval_count);
 
     ecs_query_impl_t *impl = flecs_query_impl(q);
     ecs_query_cache_t *cache = impl->cache;