RFR: 8349638: Build libjdwp with SIZE optimization

Wed Apr 9 12:29:40 UTC 2025

On Tue, 11 Feb 2025 15:56:39 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> The libjdwp is currently built with LOW optimization level, it could be built with SIZE optimization to lower the lib size by ~ 10 % on UNIX.
> On Windows LOW and SIZE currently translate to the same O1 optimization flag so no difference there.
> 
> On Linux x86_64 for example the lib shrinks from
> 300K to 268K and the debuginfo file shrinks from 1.9M to 1.7M .
> 
> On Linux ppc64le for example the lib shrinks from
> 428K to 368K and the debuginfo file shrinks from 2.0M to 1.7M .

O.M.G.

This is sooo messed up. I am thinking about making a special build where I set everything to -O3 and another where I set everything to -Os and just see what difference it makes in size and performance tests, and then suggest just going for one of them at the general rule (with exceptions for individual libraries, if needed).

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

PR Comment: https://git.openjdk.org/jdk/pull/23563#issuecomment-2789534753