ANN: ClojureScript 1.10.439

[David Nolen]

ClojureScript, the Clojure compiler that emits JavaScript source code.

README and source code: https://github.com/clojure/clojurescript

Leiningen dependency information:

[org.clojure/clojurescript "1.10.439"]

Please refer the announce post for the details:

https://clojurescript.org/news/2018-11-02-release

As always, feedback welcome!

## 1.10.439

### Changes

* CLJS-2904: Default :npm-deps to false

* CLJS-2878: Update Closure Compiler to v20180805

* CLJS-2827: Avoid var special in core macros for private var access

* CLJS-2819: Warn on non-dynamic earmuffed vars

* CLJS-2806: Bump test.check to 0.10.0-alpha3

* CLJS-2815: Support string keys in :global-exports

* CLJS-2812: Support for overriding object printing

* CLJS-2805: Bump tools.reader to 1.3.0

* CLJS-1702: Warning when using private vars

* Align ClojureScript AST to tools.analyzer

### Enhancements

* CLJS-2903: Support fingerprinting

* CLJS-2897: cljs.main: Display initial REPL prompt sooner

* CLJS-2884: Support for GraalJS RC6

* CLJS-2859: Graal.JS: Enable high-res timers by default, allow user-configuration

* CLJS-2831: Add a graaljs REPL environment

* CLJS-1997: Outward function type hint propagation

* CLJS-844: Optimize js->clj by switching to transients

* CLJS-2442: `set` and `vec` performance enhancements

### Fixes

* CLJS-2953: stest/with-instrument-disabled prints warning of private use

* CLJS-2728: Ability to disable macro spec checks

* CLJS-2843: s/explain of evaluated predicate yields :s/unknown

* CLJS-2951: Add a spec generator for some?

* CLJS-2940: Can't define nilable spec on undefined pred

* CLJS-2948: Stack overflow calling instrumented variadic fn with zero args

* CLJS-2793: Instrumenting breaks function with varargs

* CLJS-2934: Enhanced delay printing

* CLJS-2864: Optimize str macro for single arity case

* CLJS-1297: defrecord does not emit IKVReduce protocol

* CLJS-2937: docstring for to-array

* CLJS-2943: Update merge-with to use key / val

* CLJS-2941: seqable? should return true for nil

* CLJS-2915: Tests fail if directory has a period (.) in the path

* CLJS-2782: lein test fails if directory has hyphens

* CLJS-2911: Avoid infinite loop on infinite partitions

* CLJS-2906: cljs.main: Crash when with default REPL

* CLJS-2883: Instrumentation fails compilation with a large number of spec'd functions

* CLJS-2896: Allow parallel analysis and compilation

* CLJS-2893: seq: use .-length instead of alength for strings

* CLJS-2890: fspec role in problem path is not useful

* CLJS-2887: Improve names in core macro specs

* CLJS-2891: stop including data in ex-info message

* CLJS-2888: Printing of spec problems buries the failing predicate which should be more prominent

* CLJS-2861: Self-host: :checked-arrays not working

* CLJS-2852: Clojure imparity: ns-publics returns different arglists for macros

* CLJS-2725: Doc on spec keywords

* CLJS-2665: Port clojure.spec.test.alpha/enumerate-namespace

* CLJS-2848: Default explain printer prints root val and spec

* CLJS-2846: [spec] s/tuple explain-data :pred problem

* CLJS-2847: s/coll-of and s/every gen is very slow if :kind specified without :into

* CLJS-2841: [spec] instrument exception doesn't contain function name in ex-data

* CLJS-2842: [spec] Clarify s/every docstring for :kind

* CLJS-2845: [spec] generate random subsets of or'd required keys in map specs

* CLJS-2844: [spec] Add support for undefining a spec

* CLJS-2840: [spec] s/keys explain-data :pred problem

* CLJS-2839: [spec] s/& explain-data :pred problem

* CLJS-2838: [spec] s/& does not check preds if regex matches empty collection

* CLJS-2837: [spec] `cat` specs should verify value is sequential

* CLJS-2541: binding not made in parallel

* CLJS-2832: Bad code gen for `((not empty?) "foo")` when compiled with no optimizations

* CLJS-2855: Browser REPL prints empty string after require

* CLJS-2821: Update doto docstring to not use Java example

* CLJS-2817: Suppress private var warnings for specs on private vars

* CLJS-2822: cljs.core.specs.alpha: Map bindings should be `:kind map?`

* CLJS-2829: Fix deep object property access for :global-exports

* CLJS-2816: Skip non-string package.json browser entry values

* CLJS-2814: Fix munge-node-lib/global-export on self-host

* CLJS-2811: cljs-1537-circular-deps fail on Windows

* CLJS-2807: Macroexpand failure with set literal

* CLJS-2799: Handle nth on seqables with negative indexes

* CLJS-2798: ChunkCons -next doesn't handle nil more

* CLJS-2589: allow / as a protocol method name in cljs

[Khalid Jebbari]

Reporting build-times changes, in a ~15loc CLJ/CLJS/CLC project, on a 8-cores CPU machine, with :parallel-build always true and timings as reported by :compiler-stats true, using boot-cljs. I've run each build at least twice to check for variations.

With CLJS 1.10.339

- :optimizations :none 

Compile sources, elapsed time: 11628.251228 msecs

Compile sources, elapsed time: 1865.551867 msecs

=> Total: ~13.5 secs (13493.803095 msecs)

- :optimizations :advanced

Compile sources, elapsed time: 13882.684487 msecs

Compile sources, elapsed time: 22.481435 msecs

Optimizing with Google Closure Compiler, elapsed time: 15468.294224 msecs

Optimizing 265 sources, elapsed time: 15892.028818 msecs

=> Total: ~45 secs (45265.488964 msecs)

With CLJS 1.10.439

- :optimizations :none

Compile sources, elapsed time: 11551.295873 msecs

Compile sources, elapsed time: 1337.826701 msecs

=> Total: ~12.8 secs (12889.122573999999 msecs)

- :optimizations :advanced

Compile sources, elapsed time: 12874.073566 msecs

Compile sources, elapsed time: 23.319803 msecs

Optimizing with Google Closure Compiler, elapsed time: 16746.485323 msecs

Optimizing 265 sources, elapsed time: 17214.70572 msecs

=> Total: ~46.8 secs (46858.584412 msecs)

No significant changes in compilation times, but it may be due to boot/boot-cljs overhead, no idea. This is completely unscientific, as it may not make use of the some things enabled only when using cljs.main.

I've also received a warning for a :private-var-access in one of my dependencies, will open an issue there.

End of report. And big thanks to all contributors!