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Formula

Web 1.0

Web 2.0 +
Comet

Web 2.0 +
Comet +
Continuations

Users

u

10000

10000

10000

Requests/Burst

b

5

2

2

Burst period (s)

p

20

5

5

Request Duration (s)

d

0.200

0.150

0.175

Poll Duration (s)

D

0

10

10

 

 

 

 

 

Request rate (req/s)

rr=u*b/20

2500

4000

4000

Poll rate (req/s)

pr=u/d

0

1000

1000

Total (req/s)

r=rr+pr

2500

5000

5000

 

 

 

 

 

Concurrent requests

c=rr*d+pr*D

500

10600

10700

Min Threads

T=c
T=r*d

500
-

10600
-

-
875

Stack memory

S=64*1024*T

32MB

694MB

57MB

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