Bartosz Kosiorek (@gang65) commented about dlls/gdiplus/graphics.c:
switch ((int)src_space) { case CoordinateSpaceWorld:
GdipMultiplyMatrix(matrix, &graphics->worldtrans, MatrixOrderAppend);
memcpy(matrix->matrix, &graphics->worldtrans, 6 * sizeof(REAL));
Instead of expensive Matrix Multiplication by [Identity Matrix](https://en.wikipedia.org/wiki/Identity_matrix), just copy matrix, and boost performance.