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I was hesitant as to how much I should go into this because you get into the semantics of the benchmark but this [0] thread goes into why - that particular implementation doesn't behave the same way as the other implementations, it uses a different db driver that doesn't synchronise, which won't be allowed in the next version of the benchmarks. Techempower publish regular snapshots of their benchmarks at [1], and if you look at any of the snapshots that aren't the last published set where the discrepancy was fixed you'll see that all of the js implementations lag far far behind.
[0] https://github.com/TechEmpower/FrameworkBenchmarks/issues/72...
...and the fastest server is javascript.
https://github.com/just-js/just
Not that you should choose it over node or bun.sh or deno. I look forward to seeing where bun.sh ends up on the chart.
Currently (well, as of the last benchmark, in July) deno is 0.9%-1.6% of the speed of the fastest options, while faster node options are around 20-40%.
> How do we know this?
Looking at the source code [0] for Deno HTTP server, they spawn at least one thread for the server to listen and handle requests, before they are sent through a MPSC channel to the thread running the Isolate.
[0]: https://github.com/denoland/deno/blob/07213dec94398aab687afd...
like bun or node or deno (Rust as well as C++).
in techempower, the vast vast majority of code running in the just-js entry is JavaScript. all the core libraries for networking and interacting with the OS are js wrappers around C++/v8. the http server, though incomplete and not production rady, is written in javascript, with http parsing handed off to picohttpparser. the postgres wire protocol is completely written in javascript. in fact, one of the advantages JS and other JIT languages have is you can optimize away a lot of unnecessary logic at run time when you need to. e.g. https://github.com/just-js/libs/blob/main/pg/pg.js#L241
the whole point of doing this was to prove that JS can be as fast as any other language for most real world web serving scenarios.
if i had more time to work on it, i am sure i could improve the fortunes score where it would be at or very close to the top of that ranking too.