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Table 4 Searching time according to session-changes (time unit: ms)

From: PKIS: practical keyword index search on cloud datacenter

Scheme

PKIS-I

   

PKIS-II

No. of sessions

1

10

100

1000

 

2500 documents

5.8

8.0

9.9

38.6

6.8

5000 documents

6.9

10.3

13.9

42.6

7.8

7500 documents

7.4

13.9

16.3

49.3

8.4

10000 documents

7.9

13.9

18.3

52.7

8.8