diff --git a/src/component.c b/src/component.c
index 1203592..6c84fd6 100644
--- a/src/component.c
+++ b/src/component.c
@@ -95,7 +95,7 @@ bool nn_invokeComponentMethod(nn_component *component, const char *name) {
         if(strcmp(method.name, name) == 0) {
             nn_callCost(component->computer, NN_CALL_COST);
             if(!method.direct) {
-                nn_busySleep(NN_INDIRECT_CALL_LATENCY);
+                nn_triggerIndirect(component->computer);
             }
             method.method(component->statePtr, method.userdata, component, component->computer);
             return true;
@@ -105,3 +105,13 @@ bool nn_invokeComponentMethod(nn_component *component, const char *name) {
     // no such method
     return false;
 }
+
+void nn_simulateBufferedIndirect(nn_component *component, double amount, double amountPerTick) {
+    double maximum = 100.0;
+    double x = amount / amountPerTick * maximum;
+    component->indirectBufferProgress += x;
+    if(component->indirectBufferProgress >= maximum) {
+        component->indirectBufferProgress = 0;
+        nn_triggerIndirect(component->computer);
+    }
+}
diff --git a/src/component.h b/src/component.h
index 7ab172a..d78c18c 100644
--- a/src/component.h
+++ b/src/component.h
@@ -25,6 +25,7 @@ typedef struct nn_componentTable {
 typedef struct nn_component {
     nn_address address;
     int slot;
+    float indirectBufferProgress;
     nn_componentTable *table;
     void *statePtr;
     nn_computer *computer;
diff --git a/src/computer.c b/src/computer.c
index 75c5753..f80aabb 100644
--- a/src/computer.c
+++ b/src/computer.c
@@ -219,24 +219,29 @@ bool nn_isUser(nn_computer *computer, const char *name) {
     return false;
 }
 
-void nn_setCallBudget(nn_computer *computer, size_t callBudget) {
+void nn_setCallBudget(nn_computer *computer, double callBudget) {
     computer->callBudget = callBudget;
 }
 
-size_t nn_getCallBudget(nn_computer *computer) {
+double nn_getCallBudget(nn_computer *computer) {
     return computer->callBudget;
 }
 
-void nn_callCost(nn_computer *computer, size_t cost) {
+void nn_callCost(nn_computer *computer, double cost) {
     computer->callCost += cost;
+    if(computer->callCost >= computer->callBudget) nn_triggerIndirect(computer);
 }
 
-size_t nn_getCallCost(nn_computer *computer) {
+double nn_getCallCost(nn_computer *computer) {
     return computer->callCost;
 }
 
 bool nn_isOverworked(nn_computer *computer) {
-    return computer->callCost >= computer->callBudget;
+    return computer->state == NN_STATE_OVERWORKED;
+}
+
+void nn_triggerIndirect(nn_computer *computer) {
+    computer->state = NN_STATE_OVERWORKED;
 }
 
 int nn_getState(nn_computer *computer) {
diff --git a/src/computer.h b/src/computer.h
index db3307b..6718cd0 100644
--- a/src/computer.h
+++ b/src/computer.h
@@ -40,8 +40,8 @@ typedef struct nn_computer {
     double temperature;
     double temperatureCoefficient;
     double roomTemperature;
-    size_t callCost;
-    size_t callBudget;
+    double callCost;
+    double callBudget;
 } nn_computer;
 
 #endif
diff --git a/src/emulator.c b/src/emulator.c
index abe2f7b..c2da9fa 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -712,9 +712,6 @@ int main() {
         }
 
         int state = nn_tickComputer(computer);
-        if(nn_isOverworked(computer)) {
-            printf("Machine overworked.\n");
-        }
         if(state == NN_STATE_SWITCH) {
             nn_architecture *nextArch = nn_getNextArchitecture(computer);
             printf("Next architecture: %s\n", nextArch->archName);
diff --git a/src/neonucleus.h b/src/neonucleus.h
index b582b66..5e33ce4 100644
--- a/src/neonucleus.h
+++ b/src/neonucleus.h
@@ -69,7 +69,6 @@ extern "C" {
 #define NN_CALL_HEAT 0.05
 #define NN_CALL_COST 1
 #define NN_LABEL_SIZE 128
-#define NN_INDIRECT_CALL_LATENCY 0.0005
 
 typedef struct nn_guard nn_guard;
 typedef atomic_size_t nn_refc;
@@ -235,11 +234,12 @@ const char *nn_addUser(nn_computer *computer, const char *name);
 void nn_deleteUser(nn_computer *computer, const char *name);
 const char *nn_indexUser(nn_computer *computer, size_t idx);
 bool nn_isUser(nn_computer *computer, const char *name);
-void nn_setCallBudget(nn_computer *computer, size_t callBudget);
-size_t nn_getCallBudget(nn_computer *computer);
-void nn_callCost(nn_computer *computer, size_t cost);
-size_t nn_getCallCost(nn_computer *computer);
+void nn_setCallBudget(nn_computer *computer, double callBudget);
+double nn_getCallBudget(nn_computer *computer);
+void nn_callCost(nn_computer *computer, double cost);
+double nn_getCallCost(nn_computer *computer);
 bool nn_isOverworked(nn_computer *computer);
+void nn_triggerIndirect(nn_computer *computer);
 
 /* The memory returned can be freed with nn_free() */
 char *nn_serializeProgram(nn_computer *computer, size_t *len);
@@ -277,6 +277,9 @@ void nn_unlockComputer(nn_computer *computer);
 /// The architecture is returned by getNextArchitecture.
 #define NN_STATE_SWITCH 6
 
+/// The machine is overworked.
+#define NN_STATE_OVERWORKED 7
+
 int nn_getState(nn_computer *computer);
 void nn_setState(nn_computer *computer, int state);
 
@@ -346,6 +349,7 @@ const char *nn_methodDoc(nn_componentTable *table, const char *methodName);
 
 /* Returns false if the method does not exist */
 bool nn_invokeComponentMethod(nn_component *component, const char *name);
+void nn_simulateBufferedIndirect(nn_component *component, double amount, double amountPerTick);
 void nn_resetCall(nn_computer *computer);
 void nn_addArgument(nn_computer *computer, nn_value arg);
 void nn_return(nn_computer *computer, nn_value val);