Test AOT compilation of Instaparse

WARNING: Never got it running with the recent Clojure 1.10. It does seem as if it may be a dead end without Cognitec behind "native compilation".

See also blog post.

lein uberjar
time java -jar ./target/uberjar/instaparse-demo-0.1.0-SNAPSHOT-standalone.jar aaabbb

This takes more than a second on my machine ...

Download GraalVM tarball, unpack it, and run the native compiler from the bin/ subdirectory. It seems to work without being on the $PATH too:

native-image --report-unsupported-elements-at-runtime -jar ./target/uberjar/instaparse-demo-0.1.0-SNAPSHOT-standalone.jar
time ./instaparse-demo-0.1.0-SNAPSHOT-standalone aaabbb

This took 11ms with GraalVM RC7. Hm, with GraalVM RC10 it runs 21ms. The compilation is lengthy though.

Without

--report-unsupported-elements-at-runtime

this happens:

error: com.oracle.graal.pointsto.constraints.UnsupportedFeatureException:
Unsupported method java.lang.ClassLoader.defineClass(String, byte[], int, int)
is reachable:
The declaring class of this element has been substituted, but this
element is not present in the substitution class To diagnose the
issue, you can add the option
--report-unsupported-elements-at-runtime. The unsupported element is
then reported at run time when it is accessed the first time.

Trace:

        at parsing clojure.lang.DynamicClassLoader.defineClass(DynamicClassLoader.java:46)
Call path from entry point to clojure.lang.DynamicClassLoader.defineClass(String, byte[], Object):
        at clojure.lang.DynamicClassLoader.defineClass(DynamicClassLoader.java:45)
        at clojure.core$get_proxy_class.invokeStatic(core_proxy.clj:268)
        at clojure.core$get_proxy_class.doInvoke(core_proxy.clj:256)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at instaparse.demo.main(Unknown Source)
        at com.oracle.svm.core.JavaMainWrapper.run(JavaMainWrapper.java:164)
        at com.oracle.svm.core.code.IsolateEnterStub.JavaMainWrapper_run_5087f5482cc9a6abc971913ece43acb471d2631b(generated:0)

License

Copyright © 2018 Alexei Matveev alexei.matveev@gmail.com

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.