What is the result when the showPerformanceMetrics() is called before loading the remote script?

What is the result when the showPerformanceMetrics() is called before loading the remote script? Correct Answer Throws an error

perflogger.showPerformanceMetrics() tells the user about the performance parameters of the script loading. If you try to make the call to perfLogger.showPerformanceMetrics() and the script hasn’t just loaded but also executed, then you will get an error.
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