RFR: 8301869: Regression ~14% in J2dBench-bimg_misc-* in 21-b5 only on linux-aarch64 [v2]

[Jayathirth D V]

On Mon, 27 Feb 2023 15:14:22 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> Jayathirth D V has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update comment
>
> make/modules/java.desktop/lib/Awt2dLibraries.gmk line 132:
> 
>> 130:   # that any cleanup of code related to AWT will not change the
>> 131:   # generated code and cause performance issues in J2DBench
>> 132:   LIBAWT_CFLAGS += -fpic
> 
> We compile with `-fPIC` as a standard flag for position independent code (I just verified that LIBAWT also gets this flag today). My understanding is that `-fpic` may result in smaller/faster code. Overriding with `-fpic` seems like its helping here, but the comment needs to be fixed to explain the actual difference and reason.

Thanks @erikj79 for your inputs. I have updated the comment to be relevant to the problem it is resolving.

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

PR: https://git.openjdk.org/jdk/pull/12761