When comparing Janus vs AsyncRun.vim, the Slant community recommends Janus for most people. In the question“What are the best plugin managers for vim?” Janus is ranked 7th while AsyncRun.vim is ranked 8th. The most important reason people chose Janus is:
Janus actually uses Pathogen to manage its chosen plugins, and lets you add your own, just as you would with Pathogen.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Builds atop Pathogen
Janus actually uses Pathogen to manage its chosen plugins, and lets you add your own, just as you would with Pathogen.
Pro Great set of defaults
Janus is a great place to start with Vim, with much of the functionality that you would expect from a modern editor, without you having to configure it all.
Pro Good user experience
Output is displayed in the quick fix window, errors are matched with error format. After a job is finished, it can ring a bell to notify you while you're focusing on editing.
Pro Fully asynchronous
Command is done in the background, no need to wait for the entire process to finish. You can explore the error output immediately, or keep working in vim while executing.
Pro Easy to use
Just start your background command by :AsyncRun (just like old "!" cmd). Easy to distribute, just a single self-contained asyncrun.vim source file.