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Table 4 Event latencies in milliseconds (ms)

From: Realizing IoT service’s policy privacy over publish/subscribe-based middleware

Event size (KB)

Event latency (ms)

Pub-to-sub (with plain)

Pub-to-sub (with AC)

Broker (with plain)

Broker (with AC)

1 KB

Min

15.699

21.094

0.044

2.328

Ave

21.100

27.014

0.074

5.647

Max

131.058

397.548

0.262

81.345

16 KB

Min

23.517

26.017

0.182

2.552

Ave

30.085

38.658

0.411

5.526

Max

250.498

281.554

8.338

43.812

64 KB

Min

39.572

42.045

0.620

3.183

Ave

53.302

59.383

1.438

6.737

Max

250.426

281.575

4.732

13.999