RFR: 8293116: Incremental JDK build could be sped up [v5]

Tue Sep 13 11:23:47 UTC 2022

On Mon, 12 Sep 2022 20:35:27 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>> Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Regenerating modfiles as necessary.
>
> I ran some tests (in a semi-automated fashion), results seem reasonable:
> 
> ## Non-API change in java.base:
> 
> sed -e 's/^}//* */}/' <src/java.base/share/classes/java/lang/Object.java.orig >src/java.base/share/classes/java/lang/Object.java
> time make
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 3192 files for java.base
> [stderr] compiling module: java.base, all Java inputs: 3192, modified files (Java or non-Java): 1, full recompile: false, non-Java modified files: 
> Stopping sjavac server
> Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> 
> real	0m3,414s
> user	0m5,188s
> sys	0m1,328s
> 
> 
> ## Non-API change in java.compiler:
> 
> sed -e 's/^}//* */}/' <src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java.orig >src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java
> time make
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 127 files for BUILD_java.compiler.interim
> Compiling up to 127 files for java.compiler
> [stderr] compiling module: java.compiler, all Java inputs: 127, modified files (Java or non-Java): 1, full recompile: false, non-Java modified files: 
> Stopping sjavac server
> Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> 
> real	0m15,530s
> user	0m22,948s
> sys	0m2,337s
> 
> 
> ## Package-private method added to java.base:
> 
> sed -e 's/^}/static void testMethod() {} }/' <src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java.orig >src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java
> time make
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 3192 files for java.base
> [stderr] compiling module: java.base, all Java inputs: 3192, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: 
> Optimizing the exploded image
> Stopping sjavac server
> Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> 
> real	0m30,190s
> user	0m6,852s
> sys	0m1,548s
> 
> 
> ## Package-private method added to java.compiler:
> 
> sed -e 's/^}/static void testMethod() {} }/' <src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java.orig >src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java
> time make | tee -a test-output
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 127 files for BUILD_java.compiler.interim
> Compiling up to 127 files for java.compiler
> [stderr] compiling module: java.compiler, all Java inputs: 127, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: 
> Optimizing the exploded image
> Stopping sjavac server
> Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> 
> real	0m17,368s
> user	0m23,831s
> sys	0m2,328s
> 
> 
> ## Public method added to java.base:
> 
> 
> sed -e 's/^}//** test. */public static void testMethod() {} }/' <src/java.base/share/classes/java/lang/Object.java.orig >src/java.base/share/classes/java/lang/Object.java
> time make
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 3192 files for java.base
> [stderr] compiling module: java.base, all Java inputs: 3192, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: 
> [stderr] compiling module: java.datatransfer, all Java inputs: 18, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.instrument, all Java inputs: 10, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.logging, all Java inputs: 35, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.compiler, all Java inputs: 127, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.scripting, all Java inputs: 15, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.net.http, all Java inputs: 142, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.management, all Java inputs: 330, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.transaction.xa, all Java inputs: 5, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.smartcardio, all Java inputs: 22, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.jvmstat, all Java inputs: 61, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.zipfs, all Java inputs: 14, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.charsets, all Java inputs: 120, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.crypto.ec, all Java inputs: 35, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.xml, all Java inputs: 1848, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.ed, all Java inputs: 3, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.dynalink, all Java inputs: 68, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.httpserver, all Java inputs: 60, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.incubator.concurrent, all Java inputs: 4, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.opt, all Java inputs: 51, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.incubator.vector, all Java inputs: 50, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.le, all Java inputs: 103, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jartool, all Java inputs: 31, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.vm.ci, all Java inputs: 203, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.management, all Java inputs: 24, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jdwp.agent, all Java inputs: 1, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jfr, all Java inputs: 260, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jsobject, all Java inputs: 4, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.net, all Java inputs: 9, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.nio.mapmode, all Java inputs: 2, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.random, all Java inputs: 11, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.sctp, all Java inputs: 33, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.unsupported, all Java inputs: 9, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.security.sasl, all Java inputs: 30, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.rmi, all Java inputs: 106, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.attach, all Java inputs: 15, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.crypto.cryptoki, all Java inputs: 76, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.vm.compiler, all Java inputs: 1, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.localedata, all Java inputs: 1838, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.internal.vm.compiler.management, all Java inputs: 1, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jcmd, all Java inputs: 40, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.compiler, all Java inputs: 413, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jstatd, all Java inputs: 11, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jdi, all Java inputs: 254, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.management.jfr, all Java inputs: 15, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.naming, all Java inputs: 198, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.naming.dns, all Java inputs: 16, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.naming.rmi, all Java inputs: 8, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.management.rmi, all Java inputs: 16, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.security.jgss, all Java inputs: 212, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.sql, all Java inputs: 77, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.prefs, all Java inputs: 15, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.xml.dom, all Java inputs: 94, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.xml.crypto, all Java inputs: 271, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.management.agent, all Java inputs: 30, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.sql.rowset, all Java inputs: 56, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.security.jgss, all Java inputs: 16, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.security.auth, all Java inputs: 30, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jdeps, all Java inputs: 139, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jshell, all Java inputs: 97, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.javadoc, all Java inputs: 243, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jlink, all Java inputs: 90, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.desktop, all Java inputs: 2769, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: java.se, all Java inputs: 1, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.unsupported.desktop, all Java inputs: 8, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.editpad, all Java inputs: 3, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.accessibility, all Java inputs: 18, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jconsole, all Java inputs: 64, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.jpackage, all Java inputs: 57, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> [stderr] compiling module: jdk.hotspot.agent, all Java inputs: 940, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.base/_the.java.base_pubapi
> Optimizing the exploded image
> Stopping sjavac server
> Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> 
> real    1m27,775s
> user    0m52,536s
> sys     0m7,856s
> 
> 
> ## Public method added to java.compiler:
> 
> 
> sed -e 's/^}//** test. */public static void testMethod() {} }/' <src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java.orig >src/java.compiler/share/classes/javax/lang/model/util/ElementFilter.java
> time make
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 127 files for BUILD_java.compiler.interim
> Compiling up to 127 files for java.compiler
> [stderr] compiling module: java.compiler, all Java inputs: 127, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: 
> [stderr] compiling module: java.se, all Java inputs: 1, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.compiler/_the.java.compiler_pubapi
> [stderr] compiling module: jdk.compiler, all Java inputs: 413, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.compiler/_the.java.compiler_pubapi
> [stderr] compiling module: jdk.jdeps, all Java inputs: 139, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.compiler/_the.java.compiler_pubapi
> [stderr] compiling module: jdk.jshell, all Java inputs: 97, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.compiler/_the.java.compiler_pubapi
> [stderr] compiling module: jdk.javadoc, all Java inputs: 243, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: /home/jlahoda/src/jdk/jdk/build/linux-x86_64-server-release/jdk/modules/java.compiler/_the.java.compiler_pubapi
> Optimizing the exploded image
> Stopping sjavac server
> Finished building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> 
> real    0m36,685s
> user    0m30,044s
> sys     0m3,273s
> 
> 
> ## Error in a newly added added public method to java.base:
> 
> 
> sed -e 's/^}/public static void testMethod() {} }/' <src/java.base/share/classes/java/lang/Object.java.orig >src/java.base/share/classes/java/lang/Object.java
> time make
> git diff src/java.base/share/classes/java/lang/Object.java | patch -R -p1
> sed -e 's/^}//** test. */public static void testMethod() {} }/' <src/java.base/share/classes/java/lang/Object.java.orig >src/java.base/share/classes/java/lang/Object.java
> echo Fixed:
> time make
> 
> 
> result:
> 
> Building target 'default (exploded-image)' in configuration 'linux-x86_64-server-release'
> Compiling up to 3192 files for java.base
> [stderr] compiling module: java.base, all Java inputs: 3192, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files:

@lahodaj The `[stderr] compiling module: java.compiler, all Java inputs: 127, modified files (Java or non-Java): 1, full recompile: true, non-Java modified files: ` lines look very nice for debugging. How did you get these? Could you make it so that they are always turned on if `$LOG_LEVEL` is `DEBUG` or `TRACE`?

Otherwise, I'm satisfied with your results.

-------------

PR: https://git.openjdk.org/jdk/pull/10104