ArrayDeque.addElements and ArrayDeque(Collection) uses a lambda method reference in the internal copyElements method:

private void copyElements(Collection<? extends E> c) {
    c.forEach(this::addLast);
}

Since ArrayDeque may be used in early bootstrap code, it would make sense to change this lambda invocation to use a simple loop instead.

Performance should be neutral, see discussion in https://mail.openjdk.org/pipermail/core-libs-dev/2026-February/159362.html