Notably this article was written based on Windows Terminal 1.18. That was before WT 1.22, which included this PR: [^1] which roughly doubled the terminal's throughput. That combined with a couple of other PRs in 1.22 made some scenarios up to _16x_ faster[^2]
[^1]: https://github.com/microsoft/terminal/pull/17510
[^2]: https://devblogs.microsoft.com/commandline/windows-terminal-...