I hang my head in shame for not reading through the whole guide before sending the question.
Apologies and Thanks! Caspar On Wed, Mar 18, 2015 at 02:52:25PM -0400, David Nolen wrote: > You need the (System/exit 0) when using a higher optimization setting and > this is explicitly mentioned in the Quick Start. This is an upstream bug in > Closure Compiler. They create a thread to increase the stack size for Java > 6, this is legitimately a bug though as Closure Compiler only supports Java > 7. > > David > > On Wed, Mar 18, 2015 at 12:48 PM, Caspar Hasenclever <[email protected]> > wrote: > > > Following the current Quick Start document at > > https://github.com/clojure/clojurescript/wiki/Quick-Start, I found that > > there is a roughly one minute long extra wait after closure optimizations > > have been applied before the JVM exits. > > > > My setup: hello word example as on the Quick Start guide, build.clj is: > > > > (require 'cljs.closure) > > > > (cljs.closure/build "src" > > {:output-to "out/main.js" > > :verbose true}) > > > > With this build call (no optimizations), compile from cold is under 3s. > > Adding simple optimizations to the above call: > > > > (cljs.closure/build "src" > > {:output-to "out/main.js" > > :optimizations :simple > > :verbose true}) > > > > makes the process take over a minute. The CPU is only active for a few > > seconds at the beginning, for the remainder of the time nothing appears > > to be happening (the output file is done and remains unchanged after the > > first few seconds). Looking at the process in jvisualvm shows threads > > called jscompiler that are also idle after a bit of activity at the > > beginning. My suspicion is that there is a timeout somewhere but I have > > not found exactly where. It looks as if it is in Google Closure as I can't > > find > > any reference to threads called jscompiler in the ClojureScript sources. > > > > A Thread dump during the wait time shows a jscompiler thread to be waiting: > > > > "jscompiler" #16 prio=5 os_prio=0 tid=0x00007f2304efb800 nid=0x5032 > > waiting on condition [0x00007f22e4713000] > > java.lang.Thread.State: TIMED_WAITING (parking) > > at sun.misc.Unsafe.park(Native Method) > > - parking to wait for <0x000000008725e6f8> (a > > java.util.concurrent.SynchronousQueue$TransferStack) > > at > > java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215) > > at > > java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460) > > at > > java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362) > > at > > java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941) > > at > > java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066) > > at > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127) > > at > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) > > at java.lang.Thread.run(Thread.java:745) > > > > Locked ownable synchronizers: > > - None > > > > Adding a simple: > > > > (System/exit 0) > > > > after the cljs.closure/build call reduces compilation by almost exactly > > a minute back down to 8 seconds with {:optimizations :simple}. > > > > System is Debian Linux (testing), Oracle JDK 8, java -version: > > > > java version "1.8.0_40" > > Java(TM) SE Runtime Environment (build 1.8.0_40-b26) > > Java HotSpot(TM) 64-Bit Server VM (build 25.40-b25, mixed mode) > > > > Compilation command line is: > > > > java -cp cljs.jar:src clojure.main build.clj > > > > Has anybody else experienced this? Is there a way to reduce the wait? > > > > Regards, > > > > Caspar > > > > -- > > Note that posts from new members are moderated - please be patient with > > your first post. > > --- > > You received this message because you are subscribed to the Google Groups > > "ClojureScript" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected]. > > To post to this group, send email to [email protected]. > > Visit this group at http://groups.google.com/group/clojurescript. > > > > -- > Note that posts from new members are moderated - please be patient with your > first post. > --- > You received this message because you are subscribed to the Google Groups > "ClojureScript" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/clojurescript. -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/clojurescript.
