Bandwidth

Abstract

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• The theoretical maximum rate of data transfer across a Computer Network

Speed measurement unit

Measured in Kbps, Mbps and Gbps etc, which refer to $1,000$, $1,000,000$ and $1,000,000,000$ Bit per second correspondingly.

Network Throughput

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• Actual rate of successful data transfer over a network. It represents the real-world performance of the connection and takes into account factors such as Network Congestion, packet loss, and other forms of interference that can affect data transmission. Throughput is often lower than the theoretical Bandwidth due to these factors

Test the Internet Throughput

Run curl -s https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py | python3 -.

Test the localhost Throughput

Run the benchmarking server on localhost on Network Port 3000 with iperf3-darwin -s -p 3000.

Run the benchmarking client to test for the bandwidth of localhost with iperf3 -c localhost -p 3000 -f M.

Bandwhich

• A CLI tool that show the Network Throughput of all apps on the machine, the remote addresses the apps are connecting to, and the Network Interface that is handling the connection
• Install with brew install bandwhich, and run it with sudo bandwhich

References

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• What is iPerf?. Or, how fast is localhost? | by Matt Lim | Medium