JavaScript performance
Like any other language, writing correct JavaScript code at scale is an involved task. As the language matures, several of the inherent problems are being taken care of. There are several exceptional libraries that aid in writing good quality code. For most serious systems, good code = correct code + high performance code. The demands of new-generation software systems are high on performance. In this section, we will discuss a few tools that you can use to analyze your JavaScript code and understand its performance metrics.
We will discuss the following two ideas in this section:
Profiling: Timing various functions and operations during script-profiling helps in identifying areas where you can optimize your code
Network performance: Examining the loading of network resources such as images, stylesheets, and scripts
JavaScript profiling
JavaScript profiling is critical to understand performance aspects of various parts of your code. You can observe timings of the functions...
