for me, this works very well:
{:ok, version} = :application.get_key(:myapp, :vsn)
Logger.info("Application xxx #{version}: started")
jpcaruana
1
vrod
jpcaruana
I’m not sure it is expensive (a benchmark would give us some clues here), I haven’t noticed any timing issue when running my app with :application.get_key(:myapp, :vsn)
0
cenotaph
I doubt any measurable performance drawbacks will occur with the following
<%= Application.get_env(:ex, :env) %>:<%= Application.spec(:ex, :vsn) %>
1