On Tue, 11 Feb 2025 15:56:39 GMT, Matthias Baesken <mbaes...@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 . > Wait, `LOW` is `-O2`? 👀 I thought it was like no optimization at all. I'm > sooo confused with these levels. So maybe going from `LOW` to `SIZE` will > actually lose more optimization than I thought. _sigh_ Yes see https://github.com/openjdk/jdk/blob/master/make/autoconf/flags-cflags.m4#L310 on gcc/clang `C_O_FLAG_NORM="-O2"` and for LOW optimization level of a lib, we use the FLAG_NORM , see https://github.com/openjdk/jdk/blob/master/make/common/native/Flags.gmk#L46 else ifeq ($$($1_OPTIMIZATION), LOW) $1_OPT_CFLAGS := $(C_O_FLAG_NORM) $1_OPT_CXXFLAGS := $(CXX_O_FLAG_NORM) ------------- PR Comment: https://git.openjdk.org/jdk/pull/23563#issuecomment-2789230263
