NOTE: this page is for Julia 0.7.0-alpha and higher. For Julia 0.6 see this branch

Revise.jl may help you keep your sessions running longer, reducing the need to restart Julia whenever you make changes to code. With Revise, you can be in the middle of a session and then update packages, switch git branches or stash/unstash code, and/or edit the source code; typically, the changes will be incorporated into the very next command you issue from the REPL. This can save you the overhead of restarting, loading packages, and waiting for code to JIT-compile.

See the documentation:

In particular, most users will probably want to alter their .julia/config/startup.jl file to run Revise automatically, as described in the "Configuration" section of the documentation.

Revise became possible because of Jameson Nash's fix of Julia issue 265. Juno is an IDE that offers an editor-based mechanism of achieving some of the same aims.