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latency_results.txt
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latency_results.txt
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This data is raw copy from the latency tester set to send a frame with
a little over 2000 KB of data every 10ms.
The number of packets sent and received is just a visual counter and
is just the total when I chose to stop the test (around 3000 or so
packets).
The latency measure are from the point the packet was sent to when it
was received back again in milliseconds. One notable data point
missing from this is how long it actually took for the client to send
3000 packets because sending large packets can put load on the browser
and it may be a lot longer than 10ms before the timer event to
send the next packet fires. So even with low latency numbers, the
actual send rate may be fairly low because sending the WebSockets
frames is impacting the performance of the browser in general.
------------------------------------------------------------
Native WebSockets implementations, 2000 byte payload, 10ms delay
Chrome 8.0.552 - native WebSockets
Packets sent: 2998
Packets Received: 2998
Average Latency: 1.84
40 Frame Running Average Latency: 1.90
Minimum Latency: 1.00
Maximum Latency: 10.00
firefox 4.0b9 - WebSockets enabled
Packets sent: 3011
Packets Received: 3011
Average Latency: 6.45
40 Frame Running Average Latency: 6.08
Minimum Latency: 5.00
Maximum Latency: 119.00
Opera 11 - WebSockets enabled
Packets sent: 3065
Packets Received: 3064
Average Latency: 9.56
40 Frame Running Average Latency: 8.15
Minimum Latency: 4.00
Maximum Latency: 53.00
------------------------------------------------------------
New web-socket-js (20f837425d4), 2000 byte payload, 10ms delay
firefox 4.0b9 - no WebSockets
Packets sent: 3088
Packets Received: 3087
Average Latency: 16.71
40 Frame Running Average Latency: 16.80
Minimum Latency: 7.00
Maximum Latency: 75.00
- First 1000 sent in 13 seconds
- Second 1000 sent in 12 seconds
- Third 1000 sent in 12 seconds
firefox 3.6.10 - no WebSockets
Packets sent: 3100
Packets Received: 3099
Average Latency: 17.32
40 Frame Running Average Latency: 16.73
Minimum Latency: 6.00
Maximum Latency: 72.00
Opera 11 - no WebSockets
Packets sent: 3007
Packets Received: 3007
Average Latency: 465.91
40 Frame Running Average Latency: 147.95
Minimum Latency: 12.00
Maximum Latency: 9143.00
- average starts at around 28ms
- time for each 500 packets: 13s, 16s, 25s, 37s, 50s, 72s
- also start seeing sent, receive lags around 1200 packets
---------------------------------------------------------------
Old web-socket-js (9e7663771), 2000 byte payload, 10ms delay
firefox 4.0b9 - no WebSockets
Packets sent: 3024
Packets Received: 3020
Average Latency: 80.59
40 Frame Running Average Latency: 60.15
Minimum Latency: 10.00
Maximm Latency: 348.00
firefox 3.6.10 - no WebSockets
Packets sent: 2777
Packets Received: 2775
Average Latency: 34.89
40 Frame Running Average Latency: 24.50
Minimum Latency: 10.00
Maximum Latency: 208.00
Opera 11 - no Websockets
Packets sent: 3012
Packets Received: 3011
Average Latency: 380.87
40 Frame Running Average Latency: 341.90
Minimum Latency: 28.00
Maximum Latency: 2175.00
- average starts at around 290ms
- time for each 1000 packets: 23s, 38s, 65s