// unboxing of a primitive adds "invokevirtual" to "checkcast".
        int unboxingSize = isPrimitiveArgument(argument) ? 6 : 3;
        return loadSize + unboxingSize;
    }

    private static boolean isPrimitiveArgument(Type argument) {
        switch (argument.getSort()) {
            case Type.BOOLEAN:
            case Type.CHAR:
            case Type.SHORT: