return newestFirst;
    }

    /**
     * Returns results from least recent to most recent.
     */
    public List<CrossVersionPerformanceResults> getResultsOldestFirst() {
        if (oldestFirst == null) {
            oldestFirst = new ArrayList<>(newestFirst);
            Collections.reverse(oldestFirst);
        }
        return oldestFirst;
    }

    @Override