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# workers-discussions
  • t
    thinking this could work: https://github.com/openzipkin/zipkin-js
  • d
    can you explain more?
  • m
    Not really, I've never done it -- If you're going to have an interactive forum, and want it to run completely in workers, then you're likely going to need to use durable objects (or perhaps hack it together with kv) to store the data etc.
  • d
    Do you know about operation based conflict-free database.
  • u
    Hi guys, I'm getting an
    Copy code
    Uncaught ReferenceError: require is not defined
    error.
  • a
    try using import syntax instead
  • a
  • u
    i'll have a look, ty
  • w
    if you aren't using something like webpack you wont be able to require packages
  • u
    yep, my mistake. that works now 😄
  • g
    Anyone dug into profiling the performance of a Worker script?
  • g
    I see that the Profiler runtime info is available in the DevTools.
  • c
    ive personally noticed they can be slow from time to time but i havent done actual scientific stuff
  • a
    What are looking for?
  • c
    imo, the performance tab might not be representative of real world speed as its using a single data centre
  • g
    Don't have an actual use-case at the moment, but I imagine it would be useful for folks to see which parts of their scripts are using the bulk of their CPU time.
  • a
    Yeah, the JavaScript Profiler (which is in open beta) in the UI is something we're hoping to support in Wrangler
  • g
    I'm guessing that it's technically possible to grab this profiling data, run it against the source map for the script, and show it against the unminified code, line for line (more or less).
  • g
    Oooh, shiny. Any thoughts on what that'll look like?
  • a
    nothing concrete yet but hopefully it feels as easy as using chrome's dev tools
  • g
    Ah, you mean when using 
    wrangler dev
    or something?     So possibly showing this in a DevTools window directly?
  • g
    ooh will it be similar to chrome devtools for node?
  • g
    where wrangler exposes a ws for devtools to connect to
  • a
    tbh I think that'd be the way to go in the future since there's already so much tech built up around connecting to those devtools endpoints like the VS Code extension for JS debugging
  • g
    Yeah, that's kind of where I was leading my questions, to be honest
  • c
    what are the chances of getting TCP connections on Workers?
  • g
    Sweeeet
  • g
  • a
    Nothing soon, though we want em too
  • c
    hmm, dang
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