don't redraw status bar for every log field

beacon_chain/nimbus_beacon_node.nim

@@ -1447,15 +1447,19 @@ proc initStatusBar(node: BeaconNode) {.raises: [Defect, ValueError].} =
   when compiles(defaultChroniclesStream.output.writer):
     defaultChroniclesStream.output.writer =
       proc (logLevel: LogLevel, msg: LogOutputStr) {.raises: [Defect].} =
-        try:
-          # p.hidePrompt
-          erase statusBar
-          # p.writeLine msg
-          stdout.write msg
-          render statusBar
-          # p.showPrompt
-        except Exception as e: # render raises Exception
-          logLoggingFailure(cstring(msg), e)
+        if msg.len > 0:
+          try:
+            if msg[^1] == '\n':
+              # p.hidePrompt
+              erase statusBar
+              # p.writeLine msg
+              stdout.write msg
+              render statusBar
+              # p.showPrompt
+            else:
+              stdout.write msg
+          except Exception as e: # render raises Exception
+            logLoggingFailure(cstring(msg), e)
 
   proc statusBarUpdatesPollingLoop() {.async.} =
     try: