Right now you'd either have to create a custom buildpack, which would effectively be the Clojure buildpack[1] minus these few lines of code[2]. Then you'd add a line to remove all the source code and anything that isn't your uberjar from the slug.
I'd be willing to add an option to the lein-heroku plugin that deploys an uberjar without the JDK (I'm the creator). If you'd like that, can you open an issue on Github[3]? Thanks. [1] https://github.com/heroku/heroku-buildpack-clojure [2] https://github.com/heroku/heroku-buildpack-clojure/blob/master/bin/compile#L28-L40 [3] https://github.com/heroku/lein-heroku/issues On Wednesday, October 7, 2015 at 2:17:43 AM UTC-5, Robin Heggelund Hansen wrote: > > I'm just trying to optimize, so it isn't vital to my app. > How do I use the builtin openjdk 7? My app makes no use of Java 8 anyway. > > onsdag 7. oktober 2015 03.56.26 UTC+2 skrev Joe Kutner følgende: >> >> The slug will also include the JDK, which is ~50mb compressed. It is >> possible to exclude the JDK and use the cedar-14 stack's JVM, which is >> currently openjdk7 because that's what Canonical supports. But then you >> don't get the all the goodness of Java 8, which is probably better for your >> app than a little boost to started up time. >> >> Are you having problems with boot timeouts, or just trying to optimize? >> >> On Tuesday, October 6, 2015 at 6:54:08 AM UTC-5, Robin Heggelund Hansen >> wrote: >>> >>> A low heroku slug size is good for improving startup of heroku >>> applications. Because of that I've spent some time lately trying to get as >>> small a slug size as possible. I eventually found a plugin called >>> lein-heroku, which allows you to just upload a single uberjar file. When >>> the build system is set up correctly, this should give you the tiniest slug >>> size possible. Yet, even though I have 20ish MB less in the repository >>> (checked with heroku run bash && du -h), the difference in slug size is a >>> mere 3MB. >>> >>> I'm consistently getting around 70-80MB in slug size. Is this as low as >>> I can go? Have anyone else done better? >>> >> -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
