Modern Full-Stack Development

Performance Hooks – The Performance Timing API, by way of 
the perf_hooks module, provides an implementation of the W3C 
Performance Timeline specification. The purpose of the API is to 
support the collection of high-resolution performance metrics. 
This is the same Performance API as implemented in modern web 
browsers.
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Readline – The readline module provides an interface for reading 
data from a readable stream (such as process.stdin) one line at a 
time.
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REPL – The repl module provides a Read-Eval-Print-Loop (REPL) 
implementation that is available both as a stand-alone program and 
includible in other applications.
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