Large delays in code when using Serial.print, etc.

[system]

  Serial.println("This is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, this is a test, ");

Maybe you need several dozen exclamation points to go along with this nonsense.