I prefer using this site:
http://miranda.ctd.anl.gov:7123/
I think the ISPs give priority to the speed tests so it looks like you're going fast. In reality, you will never be able to upload that fast except on that site.
TCP/Web100 Network Diagnostic Tool v5.3.4e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 943.71Kb/s
running 10s inbound test (server to client) . . . . . . 1.80Mb/s
The slowest link in the end-to-end path is a 10 Mbps Ethernet subnet
Information: The receive buffer should be 98850.0 Kbytes to maximize throughput

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