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 .