Performance benchmarks for Node 25.6.1, Deno 2.6.9, and Bun 1.3.9, measuring HTTP throughput, JSON parse and stringify, hashing, buffers, and async scheduling.
  • spartanatreyu
    3·
    8 days ago

    This benchmark is pretty useless.

    There’s no benchmark code shown to see if they’re doing something wrong or cherrypicking.

    Also, they only tested on arm64? Why weren’t they testing on x86-64?

    And what the hell is this test?

    Common data transformation pattern, map then aggregate with reduce.

    People who care about performance are using loops, not map(). Why are you even testing the slow path?

      • spartanatreyu
        2·
        8 days ago

        Bro, how are generators going to be faster?

        This is an AI article.

        My results:

        Firefox:

        Loop: 44ms - timer ended

        Generator: 4580ms - timer ended

        Node (uses same engine as deno, chrome, edge):

        Loop: 30.577ms

        Generator: 1.533s

        Safari (uses same engine as bun):

        Loop: 605.222ms

        Generator: 2804.669ms

        Bun (same engine as Safari but without needing to apologise for Safari):

        [17.52ms] Loop

        [297.17ms] Generator

        Generators are going to be slow because:

        • they’re going to be stack switching so much in JS runtimes which adds a lot of overhead
        • JS doesn’t have the other language features (yet) that you want to use with generators, which makes less folks want to use generators, which makes implementers not want to spend time optimising them. (Why bother trying to inline generator state when it’s probably going to change once the adjacent features come in?)

        Until generators don’t rely on stack switching, they’re always going to be super slow.

      • spartanatreyu
        1·
        7 days ago

        It’s a garbage article.

        It’s not checking other’s claims, it’s not saying anything new, it’s not even listening to the majority of the parties.

        For each of the parties (node, deno, bun): they are incentivised to only release benchmarks that make themselves look good, and are disincentivised to release benchmarks that make themselves look bad.

        This article only uses benchmarks from one party then declares it the winner.

        So, it’s garbage.