How We Improved the Performance of a Userspace TCP Stack in Go by 5X
At Coder we’re in the business of making cloud development environments awesome. When you are developing remotely, the speed and quality of the connection you have to your workspace is a big driver of the overall experience you’ll have. One important measure of how good your connection is:
Throughput is usually quoted in bits per second, and on modern internet networks, these range from a few millions of bits per second (Mb/s) to a few billions of bits per second (Gb/s).
You will really notice throughput differences when copying files to and from your workspace, or testing web applications that push heavy assets.
Coder v2.12, which we have just released, includes several networking improvements that together increase throughput dramatically: over 5x in some cases. Below is a comparison of throughput test results for 3 different versions of Coder, across 3 different AWS environments with different latencies. They are all based on t3.xlarge VM instances. Your throughput will vary based on many factors besides latency including the speed of your connection and network congestion.
The 60ms test is from us-east-1 to us-west-1, and is a typical latency you might experience connecting to a Coder Workspace relatively far from home, say, across the continental USA.
