RFR: 8348830: LIBFONTMANAGER optimization is always HIGHEST

[Matthias Baesken]

On Tue, 28 Jan 2025 13:32:56 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> In the makefile we reset LIBFONTMANAGER optimization, but is always set to HIGHEST so we can avoid the resetting.

Thanks for the reviews !

> Not all libraries do especially performance critical things.

Agree, it was not my suggestion to set everywhere HIGH/HIGHEST .  The question I had is  - are there libraries where we set LOW because higher/other opt-levels would break the library (compilation and also runtime - wise)  ?
For most of the libs probably other opt levels would work too, but it is hard to say in general.
Other question - for hotspot / libjvm  we have the option to influence the opt - level we want to use in the build, e.g. by setting  jvm feature opt-size  and  als link-time-optimization .
As far as I know we do not have this yet for JDK native libs. I would like to have it at least for libs where it is possible and does not break anything  (probably some opt-in parameter of the make rule of the lib ).

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PR Comment: https://git.openjdk.org/jdk/pull/23332#issuecomment-2620965972