@dnolen I wasnt complaining about the perf being bad, I just didnt expected such variation between optimization levels, that's my point. Anyway, upgrading node solved the problem and thus the problem wasnt in clojurescript itself.

Right we test multiple VMs to check for these kinds of oddities

Also you have to careful often with micro benchmarks like that you aren’t measuring anything

That is really good numbers mean nothing is happening

My company currently uses javascript/node.js and we're evaluation options, we'd like to see languages that compile down to javascript and migrate our codebase. Reason, ClojureScript, Fable etc

and predictability is a very very important feature, we don't want surprises in production hehe

those are very different options

and I don't know what predictability means w/ modern VM architectures

in the end it's JS and JS VM stuff applies

and also all of them are different

anybody that says that they can play around all the VMs is not telling the truth

when we started V8 was the fastest - now JSC is the fastest

and Spidermonkey is no longer awful

(if you're mostly doing backend node.js then of course you have less to consider here)

Yes, it's basically for aws lambda

we use aws lambdas, which are small functions (we try to keep them small hehe)

then ClojureScript might not be a good fit depending on your perspective on cold start times - Clojurists do it because Clojure and I think people know that cold start while crappy in dev, in production doesn't mean much when you have real load + retry, backoff etc.

I didnt want to use clojure (on top of jvm) because of the cold starts and the large use of memory. I was trying to find a way to keep the same behavior we have with javascript (which is very good) but using a "more sane" language.

that's how I had the idea of trying out clojurescript etc

like I said I'm somewhat skeptical about those concerns - but if you're really writing tiny stateless scripts I also don't see why the language choice really matters so much

sorry if I sound too naive I'm new to this FaaS thing

if your goal is to write tiny stateless scripts - probably JavaScript, TypeScript, or Reason are good choices

you more or less get what you wrote on the JS side

I'm not sure about Fable's output, but if they do what we do which is a lot of custom data structures then it's not going to be all that small

it looks like Fable aims to produce readable javascript, so it's more like Reason

readable is less important than whether they have a large standard library

(wrt. to codesize I mean)

ClojureScript does have a large standard library, almost an incredible amount is just persistent data structure implementation details

this is why we use Closure Compiler - it takes the standard library down to gzipped jQuery territory

but that's far cry from a couple of hundrend hand-written JS lines for a Lambda

yeah, Fable adds a lot of code because of its stdlib

yeah so this is JS target design space issue - either your thing is just JS w/ some flavor of type-checking w/ some flavor of syntax - or it brings more to the table - the later won't be great for tiny scripts - and we're on that end of spectrum because just believe there's more value to be delivered there

alright it makes sense. clojurescript and fable are super nice but they aren't the right tool for what i need to build.

with Reason, it’s even a bit more complex; there are multiple standard libs to choose from, plus the runtime (immutable data and other things)

hey! I’ve never done anything in clojurescript, only toyed around with clojure. I want to make a static website that allows someone to upload a file to my google drive, basically a form. any recommendations about where to start? libraries etc

just use ClojureScript

you should able to do that w/o any third party things

ClojureScript includes Google Closure Library which has a bunch of the typical browser libs you need

ah nice! I’ll check that lib, sounds promising 😄 thanks!

Has anyone had and success/failure/luck with using the AWS Amplify Library in ClojureScript?

Hello! How can I get a success?

(str/replace
   "a--
--b"
   #"(?s)a.*b"
   "success")

(str/replace "a-\n-b" #"a[\s\S]*b" "success")

https://stackoverflow.com/questions/1979884/how-to-use-javascript-regex-over-multiple-lines

the gist is to specify all whitespace characters and all non-whitespace characters

hm... I see

DON'T use (.|[\r\n]) instead of . for multiline matching.
DO use [\s\S] instead of . for multiline matching

its saying to use [\s\S]* as my example there, right?

oh, now I see, sorry and thanks!

it seems js allows for [^] (complement of empty-set) but cljs doesn't like this. "Unclosed character class ..."

yeah it was a bit awkwardly phrased but i think the \s\S is what they recommend

I tried and it works! Thanks again