check_timings.py: start printing immediately

selfdrive/debug/check_timings.py

@@ -18,7 +18,7 @@ if __name__ == "__main__":
       for m in msgs:
         ts[s].append(m.logMonoTime / 1e6)
 
-      if len(ts[s]) == ts[s].maxlen:
+      if len(ts[s]):
         d = np.diff(ts[s])
         print(f"{s:17} {np.mean(d):.2f} {np.std(d):.2f} {np.max(d):.2f} {np.min(d):.2f}")
     time.sleep(1)