redo presentation queue waiting

projects/apis/metal/src/submit/metal_submit.m

@@ -1,10 +1,18 @@
 #include "metal_submit.h"
 #include "synchronization/fence/gryphn_fence.h"
 
+#include "stdio.h"
+#include "time.h"
+
+
 gnReturnCode metalSyncSubmit(gnOutputDevice device, gnSubmitSyncInfo info) {
+    clock_t begin = clock();
     for (int i = 0; i < info.waitCount; i++) {
         while (!info.waitSemaphores[i]->semaphore->eventTriggered) {}
     }
+    clock_t end = clock();
+    double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
+    printf("time spent waiting for image in submit: %lf\n", time_spent);
 
     __block gnSemaphore* semsToSignal = info.signalSemaphores;
     __block int semsToSignalCount = info.signalCount;