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Why is my "fast" mobile connection so slow
- chetanahuja 13y agoThat one chapter is the most readable and concise description I've ever seen capturing all the problems of using TCP over high latency connections. My post title calls out "fast" mobile networks because the connection "speed" is always expressed in terms of bandwidth in all carrier marketing. Reading that page tells you why that's a mostly meaningless number without also knowing the RTT (connection latency) for that same network in typical conditions.
- chetanahuja 13y agoAnd here's a spreadsheet that implements the formula for amount of time it takes TCP to start filling the available bandwidth for the channel it's using. Hover over the cells to see notes about what they mean. The main variables to tweak are RTT and the available channel bandwidth. The answer you're looking for is in cell B5. https://docs.google.com/spreadsheet/ccc?key=0An9tG32cwT8UdFZFOVY3QkFVS005bFVpMHdHR2stVWc#gid=0 https://docs.google.com/spreadsheet/ccc?key=0An9tG32cwT8UdFZ...