Slow get data

hey, im try get 4500 data, but very slow 7second to complete.

im using slice scroll .

this my code

    	      int slices = 5;		
            		SearchSourceBuilder searchSourceBuilder = SearchSourceBuilder.searchSource();
            		IntStream.range(0, slices).parallel().forEach(i -> {
            			SliceBuilder sliceBuilder = new SliceBuilder(i, slices);
            			SearchResponse response = client.prepareSearch("twitter_timeline_v1").setTypes("twitter_timeline")
            					.setSource(searchSourceBuilder)
            					.setScroll(new TimeValue(60000))
            					.slice(sliceBuilder)
            					.setFrom(0)
            					.setSize(1000)
            					.setQuery(qb)
            					.setExplain(false)
            					.get();
        do {
        			for (SearchHit responses : response.getHits()) {

        				List<String> tes1 = (List<String>) responses.getSource().get("tweet");
        				count.addAll(tes1);			
        			}			
        			 response = client.prepareSearchScroll(response.getScrollId()).setScroll(new TimeValue(60000)).execute().actionGet();		
        			}
        		while(response.getHits().getHits().length !=0);	
        		});`

{

“state”: “open”,

“settings”: {

“index”: {

“creation_date”: “1512717534505”,

“number_of_shards”: “5”,

“number_of_replicas”: “1”,

“uuid”: “85bJTl_UTsOWyMNKTLXxAw”,

“version”: {

“created”: “5000005”

}

}

}
any solution?
thanks

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