diff --git a/frontend/wasm/src/common.ts b/frontend/wasm/src/common.ts
index 3c98573..d38bbfd 100644
--- a/frontend/wasm/src/common.ts
+++ b/frontend/wasm/src/common.ts
@@ -38,7 +38,7 @@ export type MessageFromWorkerType = { replyToId?: number } & (
     { type: "rttData", data: string } |
     { type: "lcdSleeping", data: boolean } |
     { type: "cpuSleeping", data: boolean } |
-    { type: "performance", data: { loopTime: number, ips: number, totalSRAM: number, pins: number } } |
+    { type: "performance", data: { loopTime: number, cps: number, totalSRAM: number, pins: number } } |
     { type: "backupData", data: ArrayBuffer } |
     { type: "commandOutput", data: string } |
     { type: "aborted", data: any }
diff --git a/frontend/wasm/src/components/Emulator.vue b/frontend/wasm/src/components/Emulator.vue
index 90005c5..5817781 100644
--- a/frontend/wasm/src/components/Emulator.vue
+++ b/frontend/wasm/src/components/Emulator.vue
@@ -35,7 +35,7 @@ template(v-if="!isReady")
                     .form-check.form-switch
                         input.form-check-input(type="checkbox" v-model="turboMode" id="turboMode")
                         label.form-check-label(for="turboMode") Turbo mode
-                    div Instructions per second: {{ numberFmt.format(performance.ips.value.toFixed(0)) }}
+                    div {{ numberFmt.format(performance.cps.value.toFixed(0)) }} Hz ({{speedPercentage.toFixed(0)}}%)
                     div Loop time: {{ performance.loopTime.value.toFixed(0) }} ms
                     div CPU: {{ isCpuSleeping ? "Sleeping" : "Running" }}
                     div RAM size: {{ numberFmt.format(performance.sramSize.value) }} bytes
@@ -70,7 +70,7 @@ template(v-if="!isReady")
 </template>
 
 <script lang="ts" setup>
-import { onUnmounted, ref, watch } from "vue";
+import { computed, onUnmounted, ref, watch } from "vue";
 
 import MyWorker from "@/worker?worker";
 
@@ -126,11 +126,13 @@ function addConsoleLine(text: string, type: Line["type"]) {
 }
 
 const performance = {
-    ips: useAverage(1000),
+    cps: useAverage(1000),
     loopTime: useAverage(1000),
     sramSize: ref(0),
 }
 
+const speedPercentage = computed(() => performance.cps.value / 64000000 * 100);
+
 const worker = new MyWorker();
 onUnmounted(() => worker.terminate());
 
@@ -177,7 +179,7 @@ worker.onmessage = async (event) => {
             break;
 
         case "performance":
-            performance.ips.value = data.ips;
+            performance.cps.value = data.cps;
             performance.loopTime.value = data.loopTime;
             performance.sramSize.value = data.totalSRAM;
             pins.value = data.pins;
diff --git a/frontend/wasm/src/worker.ts b/frontend/wasm/src/worker.ts
index 3d8b1a8..3160413 100644
--- a/frontend/wasm/src/worker.ts
+++ b/frontend/wasm/src/worker.ts
@@ -80,7 +80,7 @@ class Emulator {
 
     private rttFoundBlock = false;
 
-    private instructionCount = 0;
+    private cycleCount = 0;
 
     get isRunning() {
         return !!this.runInterval;
@@ -119,14 +119,14 @@ class Emulator {
         this.rttReadBuffer = numberToPointer(Module._malloc(this.rttReadBufferSize));
     }
 
-    private doLoop(iterations: number) {
-        this.instructionCount += iterations;
-        return this.Module._pinetime_loop(this.pinetime, iterations);
+    private doLoop(cycles: number) {
+        this.cycleCount += cycles;
+        return this.Module._pinetime_loop(this.pinetime, cycles);
     }
 
     private run() {
         const start = performance.now();
-        const instructionCountStart = this.instructionCount;
+        const cycleCountStart = this.cycleCount;
         let screenUpdated = false;
 
         if (this.turboMode) {
@@ -138,7 +138,7 @@ class Emulator {
             }
         }
 
-        if (this.instructionCount < 10000000 && !this.rttFoundBlock) {
+        if (this.cycleCount < 10000000 && !this.rttFoundBlock) {
             this.rttFoundBlock = !!this.Module._rtt_find_control(this.rtt);
             if (this.rttFoundBlock)
                 sendMessage("rttFound", undefined);
@@ -174,7 +174,7 @@ class Emulator {
 
         sendMessage("performance", {
             loopTime: end - start,
-            ips: (this.instructionCount - instructionCountStart) / ((end - start) / 1000),
+            cps: (this.cycleCount - cycleCountStart) / ((end - start) / 1000),
             totalSRAM: this.Module._nrf52832_get_sram_size(this.nrf52),
             pins: this.Module._pins_read_all(this.pins),
         });
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ba9f343..c94d2b7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -11,7 +11,6 @@ set(SRC_FILES
     pinetime.c
     pins.c
     program.c
-    scheduler.c
     segger_rtt.c
     ticker.c
 
@@ -63,6 +62,7 @@ set(SRC_NATIVE_FILES
     main.c
     pcap.c
     runlog.c
+    scheduler.c
     time.c
 )
 
diff --git a/src/wasm.c b/src/wasm.c
index c7896f6..db5ceef 100644
--- a/src/wasm.c
+++ b/src/wasm.c
@@ -5,14 +5,14 @@
 
 #include <emscripten.h>
 
-bool pinetime_loop(pinetime_t *pt, size_t n)
+bool pinetime_loop(pinetime_t *pt, int cycles)
 {
     st7789_t *lcd = pinetime_get_st7789(pt);
     size_t initial_write_count = st7789_get_write_count(lcd);
 
-    while (n--)
+    while (cycles > 0)
     {
-        pinetime_step(pt);
+        cycles -= pinetime_step(pt);
     }
 
     return st7789_get_write_count(lcd) != initial_write_count;