Tango Interactive Virtual Meeting startup times, in seconds:
Machine: a 300 MHz Pentium II PC under Windows NT 4.0
Connection
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First load ever
|
First load after browser start
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Subsequent loads
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64 kpbs ISDN
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IE: 62, N: 158
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IE: 17, N: 145
|
IE: 8, N: 35
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128 kpbs ISDN
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IE: 40, N: 140
|
IE: 15, N: 90
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IE: 6, N: 24
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LAN
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TBD
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TBD
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TBD
|
|
Machine: a 550 MHz Pentium III PC under Windows NT 4.0
Connection
|
First load ever
|
First load after browser start
|
Subsequent loads
|
LAN
|
TBD
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TBD
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TBD
|
|
All numbers are in seconds, for Internet Explorer (IE) and Netscape (N), respectively. "First load ever" corresponds to the first TI startup after our plugin software has been installed. This time is the longest, as there is no benefit of file caching and local installation (Internet Explorer). After the system has been used at least once, all subsequent startups will be shorter, especially for Internet Explorer. "First load after browser start" corresponds to first TI system startup after the browser has been (re)started. Restart of the TI system in a working browser is very fast, even in Netscape.
System startups in Internet Explorer are dramatically shorter as compared to Netscape. This difference is caused by two factors: generally more efficient byte code checking in the IE Java VM, as well as the IE ability to treat certain external Java libraries is "trusted code". TI system extensively uses Swing libraries from Sun. These libraries are installed on the client machine during plugin installation. With IE, they are verified ONCE and then treated as trusted code. Netscape browser runs the byte code checking procedure on the Swing library every time the library is activated the first time after browser startup. Swing library byte code checking procedure accounts for ~75% of the system startup time in Netscape.
Since the system startup is a CPU-intensive operation, it gets shorter on faster machines. On a state-of-the-art PCs TI system startups is almost instantenous.On the other hand, on Unix machine the startup can take up to 5 minutes. |