@dfcarpenter what version of ClojureScript? 1.9.908?

1.9.908

@dfcarpenter probably means we can’t resolve packages like animated yet

@dnolen Ahh ok. Thanks! ill stick to transition group for now

RuntimeException: INTERNAL COMPILER ERROR.
Please report this problem.

EXPR_RESULT 86 [length: 6] [source_file: node_modules/animated/lib/index.js]
  Node(NAME spring): node_modules/animated/lib/index.js:86:4
var spring=function spring(
  Parent(VAR): node_modules/animated/lib/index.js:86:0
var spring=function spring(

	com.google.common.base.Preconditions.checkState (Preconditions.java:444)
	com.google.javascript.rhino.IR.assign (IR.java:424)
	com.google.javascript.jscomp.ProcessCommonJSModules$RewriteModule.updateNameReference (ProcessCommonJSModules.java:1100)
	com.google.javascript.jscomp.ProcessCommonJSModules$RewriteModule.maybeUpdateName (ProcessCommonJSModules.java:982)
	com.google.javascript.jscomp.ProcessCommonJSModules$RewriteModule.visit (ProcessCommonJSModules.java:727)

seems like closure can’t quite compile it yet (that a closure compiler error when importing)

Hi i'm trying to connect to figwheel from a external computer, so that i could see the result of my app on this external computers screen. I use luminus as a base for my app . I tried setting :server-ip in project.clj but i see in the browser console on the external computer that it still tries to connect to localhost:3449. How do i configure the figwheel server ip?

@danielsu give :websocket-host "0.0.0.0" a try 🙂

Thanks, actually setting server-ip to 0.0.0.0 and websocket-host to the actual ip of the server did work :)

hi, suddenly the emacs command cider-jack-in-clojurescript throws me this error Failed to compile "target/cljsbuild/public/js/app.js" in 5.551 seconds. OutOfMemoryError PermGen space [trace missing]

if I do lein figwheel and lein repl from powershell, the project inits well with no such error

looking for some resources about performance comparison between cljs and js any suggestion ?

@lxsameer I doubt anyone could produce general performance comparison which would stay relevant and useful. 1) javascript engines are moving targets 2) google closure compiler is a moving target as well 3) coding style is a big factor a well - you can write code in cljs which would compile into plain straightforward javascript (e.g. interop or raw loop-recur) or you could write code which will rely heavily on persistent data structures, laziness and dynamic protocol dispatch and similarly on the js side you can write old-school vanilla javascript or use more modern functional approach or libraries.

I'm aware of these things

the point i want to make is that cljs performance is good and acceptable

so a simple comparison would be enough

well, "cljs performance is good and acceptable" is not generally true, you wrote it because you have some use-case in mind

example: cljs performance is not acceptable for webgl stuff, or heavy d3.js work

I mean "game engine"-like use-cases

hmmm did you run a experiment ?

no

I'm using cljs with d3 and it's as good as the js version

there are some issues which is not related to performance but it's good with d3 , I don't know about webgl usage though

sure, we can find specific use-cases where the performance is ok, but if you need to push browser to the limits you need to go to raw javascript without persistent data

but this is not my point, I just wanted to say that you cannot make general statement that "cljs performance is good" without saying the other half of the sentence "for what exactly"

and "under what environment"

I personally don't care about it, because I know that I can always benchmark my own cljs code and rewrite performance bottlencecks in js in case of performance problems

alright , I'll include that in my slides as well

but I don't write much performance critical code anyways, I suspect rewriting in js would be last resort, first thing would be to try to redesign the algorithm or write more interoppy cljs 🙂

@lxsameer you can write performant code directly in CLJS - not particularly idiomatic but that’s how the persistent data structures are implemented

we would have written those in JS if there were any real problems

@dnolen I see, I'm totally agree with you, I'm going to give a talk on clojurescript in a ruby community, I'm looking for some comparisons or facts to show them that clojurescript code can be really performant

@lxsameer I don’t really understand what you are looking for?

we intentionally provide constructs that map to known fast JS operations

cool, thanks

loop/recur, mutable locals, deftype etc.

you can just write the same type of code you would in JS

guys, I'm playing around with cljs and I came to the point that I need a humanized string representation of a time delta (inseconds)

is there any cljs library I can use for the purpose?

https://dev.clojure.org/jira/browse/CLJS-2334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel After this fix I tried again to build a clojurescript (with 1.9.930) project where a CLJS file requires a JS :es6 file, which again requires another JS :es6 file in the same folder. JS -> JS require still doesn't work for me. Am I doing it wrong?