I used jlink to create minimal custom JRE image on OSX and Linux and I noticed there is a significant difference in size. The Mac version takes 21M where the Linux one takes 30M which means Linux version is 50% bigger than Mac.
Is it as you would have expected? Why is size difference so big? I noticed that lib/modules is similar in size (1M difference) but the biggest difference is between ./lib/server/libjvm.dylib (12 M) and ./lib/amd64/server/libjvm.so (21 M). So the linux version of the shared library object is almost twice as big on linux (both 64 bit). Here is the command I used to create the image: jdk-9/bin/jlink --module-path jdk-9/jmods --add-modules java.base --output image_target --strip-debug --compress=2 Here is a detailed listing of files on Mac: 68K ./bin/java 68K ./bin/keytool 8.0K ./conf/net.properties 4.0K ./conf/security/java.policy 40K ./conf/security/java.security 4.0K ./conf/security/policy/limited/default_local.policy 4.0K ./conf/security/policy/limited/default_US_export.policy 4.0K ./conf/security/policy/limited/exempt_local.policy 4.0K ./conf/security/policy/README.txt 4.0K ./conf/security/policy/unlimited/default_local.policy 4.0K ./conf/security/policy/unlimited/default_US_export.policy 20K ./include/classfile_constants.h 4.0K ./include/darwin/jni_md.h 76K ./include/jni.h 80K ./include/jvmti.h 4.0K ./include/jvmticmlr.h 68K ./lib/jli/libjli.dylib 16K ./lib/jspawnhelper 4.0K ./lib/jvm.cfg 204K ./lib/libjava.dylib 32K ./lib/libjimage.dylib 12K ./lib/libjsig.dylib 92K ./lib/libnet.dylib 68K ./lib/libnio.dylib 44K ./lib/libosxsecurity.dylib 48K ./lib/libverify.dylib 32K ./lib/libzip.dylib 7.2M ./lib/modules 4.0K ./lib/security/blacklist 4.0K ./lib/security/blacklisted.certs 112K ./lib/security/cacerts 8.0K ./lib/security/default.policy 0B ./lib/security/trusted.libraries 12K ./lib/server/libjsig.dylib 12M ./lib/server/libjvm.dylib 4.0K ./lib/server/Xusage.txt 104K ./lib/tzdb.dat 4.0K ./release Here is a detailed listing of files on Linux: 4.0K ./lib/security/blacklisted.certs 8.0K ./lib/security/default.policy 4.0K ./lib/security/blacklist 0 ./lib/security/trusted.libraries 104K ./lib/tzdb.dat 12K ./lib/jexec 4.0K ./lib/amd64/jvm.cfg 108K ./lib/amd64/libnet.so 72K ./lib/amd64/jli/libjli.so 132K ./lib/amd64/libjimage.so 220K ./lib/amd64/libjava.so 36K ./lib/amd64/libzip.so 21M ./lib/amd64/server/libjvm.so 4.0K ./lib/amd64/server/Xusage.txt 12K ./lib/amd64/server/libjsig.so 88K ./lib/amd64/libnio.so 12K ./lib/amd64/libjsig.so 64K ./lib/amd64/libverify.so 8.2M ./lib/modules 4.0K ./release 4.0K ./include/jvmticmlr.h 4.0K ./include/linux/jni_md.h 20K ./include/classfile_constants.h 80K ./include/jvmti.h 76K ./include/jni.h 4.0K ./conf/security/policy/limited/default_local.policy 4.0K ./conf/security/policy/limited/default_US_export.policy 4.0K ./conf/security/policy/limited/exempt_local.policy 4.0K ./conf/security/policy/README.txt 4.0K ./conf/security/policy/unlimited/default_local.policy 4.0K ./conf/security/policy/unlimited/default_US_export.policy 40K ./conf/security/java.security 4.0K ./conf/security/java.policy 8.0K ./conf/net.properties 12K ./bin/java 12K ./bin/keytool Regards, Waldek Sent from my iPhone
