RFR: 8365053: Refresh hotspot precompiled.hpp with headers based on current frequency [v10]

Magnus Ihse Bursie ihse at openjdk.org
Mon Aug 11 08:13:12 UTC 2025


On Mon, 11 Aug 2025 07:59:02 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> But still need to figure out which files to (conditionally) exclude.

Maybe first make a baseline build with no optional features, and analyze the result with this tool. And then enable each individual feature, re-build and re-analyze, and see how it differs. If a file then makes it to the PCH list, it is useful when enabling that feature, and it is potentially only correct to include with that feature enabled, so it could be added with an include guard.

That will require a bit more manual work (unless this process too can be automated), but it will probably give the best results.

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PR Comment: https://git.openjdk.org/jdk/pull/26681#issuecomment-3173692668


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