RFR: JDK-8188312 Use CDS if present when running the Boot JDK during build

Claes Redestad claes.redestad at oracle.com
Tue Oct 3 10:48:46 UTC 2017


-Xshare:auto silently ignores failures to map the shared archive and 
should be safe to use. I think you're thinking of -Xshare:on which will 
fail/abort the VM if mapping fails.


On 2017-10-03 12:28, David Holmes wrote:
> Hi Magnus,
> As I just put in the bug report, it isn't quite this simple. You have 
> to be able to tolerate/recover from failure to map the shared archive.
> Cheers,
> David
> On 3/10/2017 8:24 PM, Magnus Ihse Bursie wrote:
>> We should use CDS to minimize Java startup time during build. We run 
>> multiple Java commands, and every second counts.
>> On my machine, I get a ~3% build time speedup with this fix.
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8188312
>> WebRev: 
>> http://cr.openjdk.java.net/~ihse/JDK-8188312-use-CDS-for-bootjdk/webrev.01
>> /Magnus

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