RFR: 8236272: Improve fidelity between contents of default CDS archive and classes loaded at runtime

[Jiangli Zhou]

Hi Claes,

Looks good to me. Nice improvement.

Best regards,
Jiangli

On Mon, Jan 27, 2020 at 9:10 AM Claes Redestad
<claes.redestad at oracle.com> wrote:
>
> Hi,
>
> when generating the default classlist, doing an extra pass with a
> -Xshare:dump between means the final classlist will be more in line
> with what will be used at runtime.
>
> Webrev: http://cr.openjdk.java.net/~redestad/8236272/open.00/
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8236272
>
> This removes a number of classes from being dumped into the default
> archive, effectively reducing size by ~170Kb (~1.5%).
>
> The size reduction might be improved upon further in the future by
> making sure that -Xshare:dump can be limited to not dump classes not
> listed in the generated classlist, but this requires changes to the
> runtime and needs to be thoroughly examined.
>
> Such potential improvements will probably need this build-time fix to be
> effective. In the mean-time, this patch provides a small but clear gain.
>
> Thanks!
>
> /Claes