InstantClick is a library based on Javascript. It is used to enhance the website performance and increase navigability. It is designed to help users with bandwidth and latency issues. It provides preloading of links. It also offers a testing feature. Its latest version is InstantClick 3.1. 

InstantClick works by way of pushState and Ajax. It provides a progress bar that is designed to be customizable. InstantClick is available for mobile devices as well. It works for mobile devices of different sizes. It allows its users to set delays with ease before the preloading begins. It helps prevent the possibility of wasted requests effectively. InstantClick provides blacklisting along with events and script re-evaluation.

jQuery Migrate is a feature available for Java users. It is available with the jQuery library, which is in-built. As the jQuery library is well known to be large in size, it requires the use of jQuery Migrate for more ease. It provides ease by reducing the time and effort involved in upgrading the jQuery versions. 

It helps by adding the eliminated APIs. It makes the user aware of the various faults in the browser and ensures that the code remains unaffected. Thus, it helps users bring in new features without compromising the old features that have been added or used. Hence, jQuery Migrate is recognized for its efficiency in code compatibility. It is optimal for use with versions older than 1.9.

Comparison InstantClick vs jQuery Migrate