Just-JS Blog

i played around with this a while back. you can see a demo here. it also lets you pull new WAL segments in and apply them to the current database. never got much time to go any further with it than this. https://just.billywhizz.io/sqlite/demo/#https://raw.githubusercontent.…

The creator of JustJS has written about how it's so fast actually: https://just.billywhizz.io/blog/on-javascript-performance-01/ (Related GitHub thread: https://github.com/just-js/just/issues/5)

Not familiar with Just, but seems its designed as a minimal wrapper over v8. The benchmark code is probably jumping directly from JS to native code... most of the github repo is C++ Edit: There's actually an article that explains how Just ranks so highly https://just.billywhizz.io/blog/on-javascript-performance-01/

Depending on specific use-case, today's JavaScript code is only 2–7 times slower than corresponding C++. That's pretty damn fast. Faster than some compiled languages. Fast enough that if you wanted to obsess over performance you can build the fastest backend framework in Node.js[0][1] [0] https://www.techempower.com/benchmarks/#section=data-r21&test=comp… [1] https://just.billywhizz.io/blog/on-javascript-performance-01/

> I am stunned that a JS tool came out on top I wanted to know why, and I found this article by the author: https://just.billywhizz.io/blog/on-javascript-performance-01/ also: https://github.com/just-js/just/issues/5#issuecomment-778673184

Bun is currently lacking workers, which at least for me is a dealbreaker. I'd also think it'd be interesting to compare against justjs when it comes to speed, since that is a very small wrapper around V8 (much smaller than node/deno) and manages to score extremely high on techempower benchmarks (top 25 on all, first/second spot on a few): https://just.billywhizz.io/blog/on-javascript-performance-01/

There's a super interesting article from the just-js author explaining how he got a JS implementation into that top 20: https://just.billywhizz.io/blog/on-javascript-performance-01/

The author of just-js did a write up about how he got that performance: https://just.billywhizz.io/blog/on-javascript-performance-01/

It's likely because of this (custom Postgres client, request pipelining and not doing sync/commit after each query): > [Multiple Queries] This is the first test where Just(js) has quite a big lead. This is likely due to the fact it is using a custom postgres client written in Javascript and taking full advantage of pipelining of requests. It also avoids sending a Sync/Commit on every query. As far as I am aware this is within the rules but will be happy to make changes to sync on every query if it is not. https://just.billywhizz.io/blog/on-javascript-performance-01/

More info here: https://just.billywhizz.io/blog/on-javascript-performance-01/

TechEmpower benchmarks and The Benchmark Game[0] are pretty comprehensive. The latter has not yet been updated for .NET 9. The former has been updated with .NET 9[1], but will have to wait for the next round of results. You can see the continuous results, though[2] I know that TechEmpower gets a lot of flak for being "unrealistic", but it's easy enough to filter out the pure middleware ones. But even those I feel are "fair game" because it shows that such optimizations are possible on the runtime if needed. The story behind one of the top entrants, Just(js) talks a bit about this[3] [0] https://benchmarksgame-team.pages.debian.net/benchmarksgame/index.html [1] https://github.com/TechEmpower/FrameworkBenchmarks/blob/master/framewo… [2] https://tfb-status.techempower.com/ [2] https://just.billywhizz.io/blog/on-javascript-performance-01/