start = System.currentTimeMillis();
        SerializeUtil.serialize(hmap);
        System.out.println("HashMap serialize:" + (System.currentTimeMillis() - start));

        start = System.currentTimeMillis();
        SerializeUtil.serialize(amap);
        System.out.println("ArrayMap serialize:" + (System.currentTimeMillis() - start));
    }

    private static class MyKey {

        try {
            resultData.setData(SerializeUtil.fromObjectToBinary(generateData(responseData)));
        } catch (final Exception e) {
            throw new CrawlingAccessException("Could not serialize object", e);
        }
        resultData.setEncoding(fessConfig.getCrawlerCrawlingDataEncoding());

        return resultData;
    }

    protected Map<String, Object> generateData(final ResponseData responseData) {

        try {
            resultData.setData(SerializeUtil.fromObjectToBinary(dataMap));
        } catch (final Exception e) {
            throw new CrawlingAccessException("Could not serialize object: " + responseData.getUrl(), e);
        }
        resultData.setEncoding(charsetName);
    }

    protected void normalizeData(final ResponseData responseData, final Map<String, Object> dataMap) {