Before: MSBuild defaulted to a single process per project, so each
vcxproj compiled its .cpp files sequentially. Local clean rebuild of
OpenZen.dll + OpenZenLoader.exe measured ~14.6 s.
After: same cold rebuild measures ~4.8 s — 3x faster — by combining
- `cmake --build --parallel <Runtime.runtime.availableProcessors()>`
in the buildNative task, which forwards a project-level `-m:N` to
MSBuild and gets DLL / Loader to build concurrently where the
dependency graph allows.
- `/MP` on the MSVC compile options, which is the actual win: it lets
cl.exe spawn one compiler process per available core within a
single vcxproj. The DLL+Loader together have ~13 .cpp files; this
is where the bulk of wall-time was being spent serially.
CI runners get the same speed-up for free.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
