.deb creation is really slow

[hootsuitemike]

.deb creation is really slow with a large static directory of included files. (~42M, ~780 files) jstack reports that all the time is spent waiting for DebianPlugin.chmod to do its thing:

"pool-7-thread-2" prio=5 tid=0x00007f900bcc7000 nid=0x6e0b runnable [0x000000026cdff000]
   java.lang.Thread.State: RUNNABLE
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
    at java.lang.ProcessImpl.start(ProcessImpl.java:130)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022)
    at sbt.SimpleProcessBuilder.run(ProcessImpl.scala:388)
    at sbt.AbstractProcessBuilder.run(ProcessImpl.scala:138)
    at sbt.AbstractProcessBuilder.$bang(ProcessImpl.scala:166)
    at com.typesafe.sbt.packager.debian.DebianPlugin$class.com$typesafe$sbt$packager$debian$DebianPlugin$$chmod(DebianPlugin.scala:33)
    at com.typesafe.sbt.packager.debian.DebianPlugin$class.com$typesafe$sbt$packager$debian$DebianPlugin$$copyAndFixPerms(DebianPlugin.scala:28)
    at com.typesafe.sbt.packager.debian.DebianPlugin$$anonfun$debianSettings$12$$anonfun$apply$17$$anonfun$apply$21.apply(DebianPlugin.scala:112)
    at com.typesafe.sbt.packager.debian.DebianPlugin$$anonfun$debianSettings$12$$anonfun$apply$17$$anonfun$apply$21.apply(DebianPlugin.scala:109)

Forking a separate process to chmod each file is probably the root of the performance problem.

[jsuereth]

Yeah. Ideally we wouldn't have to do this if we have Java7 as an option. Patches welcome to fix this.

[muuki88]

Are there plans for how long we should be backwards compatible with java6?

[jsuereth]

not really....

[retronym]

Could you chmod in batches?

On Thursday, January 23, 2014, Josh Suereth notifications@github.com
wrote:

not really....

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/135#issuecomment-33156447
.

[jsuereth]

That could definitely help. Again, patches welcome.

[muuki88]

A workaround is know to use jdeb packaging, which is a lot faster than native packaging.

packageBin in Debian <<= debianJDebPackaging in Debian