I’m using a Dockerfile to deploy a Genie app on a host and among other commands, I deploy the app with: RUN julia -e "using Pkg; pkg\"activate . \"; pkg\"instantiate\"; pkg\"precompile\"; " However, upon starting the app, it still takes about 30s for the first run (it’s a very small free Heroku se…

It runs the same thing that happens when the package is imported for the first time.

Thanks :slight_smile: That just moved the problem somewhere else: “what happens when the package is imported for the first time”? Is there anything in the docs about it?

Thanks, that’s useful. I’ll try with SnoopCompile. I’ve been running a lot of tests with PackageCompiler but I can’t automate the compilation. The main issue seems to be that is uses the tests files which use packages which are not dependencies of the main package (ie my app uses Plots and does not…

You could send a dummy request when the server starts. Not sure if that’s good enough for what you’re trying to do.

Yes, this is another option I’m considering. Though it’s a bit more complicated. Heroku powers down the server on the free tier when the app is idle - and automatically restarts it on first request. It takes about 3s on the first request just to restart the server - but the real problem is with Juli…

So, I’m reading your post again after two days (I did read it the first time, of course), but I’m wondering if Heroku might not be the problem here? Might you be better served by a flat, always-up VPS? I’m not the expert, but I know there is a docker-based Heroku clone called dokku which you can se…

I can’t objectively say that Heroku is the problem. Objectively, the problem is the long JIT-compilation time which can not be controlled/eliminated. The more complex the app and the larger packages it has, the longer it takes to (re)start it up. I’m happy with DO but that’s not what I’m after. My …

[image] essenciary: We really need a way to speed up deployments/first-runs of Julia apps. In what way doesn’t PackageCompiler + a script that runs a representative workload not work? Julia itself does this to “deploy” a julia with a fast REPL + Pkg etc. We literally run a little mini julia …

@kristoffer.carlsson Thanks All the attempts I’ve made at building a custom sys image with PackageCompiler failed. Literally none worked. I used the PackageCompiler API and passed the names of the packages I wanted added to the sys image, with both full and incremental pre-compilation (as shown in …

Precompilation techniques for speeding up the first run (Heroku deployments and PackageCompiler)

General Usage

ninjaaron September 30, 2019, 2:36pm 4

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Precompilation techniques for speeding up the first run (Heroku deployments and PackageCompiler)

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