[test] Check the engine size on web platform after removing @serializable decorator

[dumganhar]

Original size: 4,770,578 bytes Remove all serializable decorator: 4,694,569 bytes, diff size: 76009 bytes (76KB)

[dumganhar]

Writing serialization code manually like the following:

public archive (ar: any) {
    super.archive(ar);
    ar.archive('_projection', this._projection);
    ar.archive('_priority', this._priority);
    ar.archive('_fov', this._fov);
    ar.archive('_fovAxis', this._fovAxis);
    ar.archive('_orthoHeight', this._orthoHeight);
    ar.archive('_near', this._near);
    ar.archive('_far', this._far);
    ar.archive('_color', this._color);
    ar.archive('_depth', this._depth);
    ar.archive('_stencil', this._stencil);
    ar.archive('_clearFlags', this._clearFlags);
    ar.archive('_rect', this._rect);
    ar.archive('_aperture', this._aperture);
    ar.archive('_shutter', this._shutter);
    ar.archive('_iso', this._iso);
    ar.archive('_screenScale', this._screenScale);
    ar.archive('_visibility', this._visibility);
    ar.archive('_targetTexture', this._targetTexture);
}

will make the js code smaller.

[dumganhar]

javascript primitive type is value type rather than reference type. How to assign the member variables?

Perhaps, just passing owner object to ar function and set the property according property name.

ar.archive('_projection', this); // this is owner

Invoking owner[key] = balabala; to set the value.