IEx.Autocomplete.expand slow when called manually | Elixir Language | Page 1

rugged marsh Oct 17, 2022, 9:40 PM

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Tab completion in iex is instantaneous, but when I manually call 'someinput' |> Enum.reverse() |> IEx.Autocomplete.expand(), it takes several seconds to return completions. Any idea why, or how I can call this and get similarly instantaneous results? I do notice it takes an optional second argument that defaults to IEx.Broker.shell(); maybe that's something?

spare prairie Oct 17, 2022, 9:50 PM

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same thing happens for me. What are you trying to do?

rugged marsh Oct 17, 2022, 9:58 PM

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Write a small filter for rlwrap. My reasons are pretty specific, just need a way to get those autocompletes at a similar speed to hitting tab in iex

spare prairie Oct 17, 2022, 10:10 PM

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the iex autocompleter assumes you're in an IEX session, it's very use-specific

rugged marsh Oct 17, 2022, 10:15 PM

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Right. In this case though, I am in an IEx session, I'd just like to call the autocompleter directly

spare prairie Oct 17, 2022, 10:15 PM

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right, I'm saying that this won't work

rugged marsh Oct 17, 2022, 10:15 PM

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That's why I'm kind of wondering if the second argument would do something

spare prairie Oct 17, 2022, 10:17 PM

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all the broker does is find your iex session.

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you're using a lot of internal modules

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I don't think they're supposed to do what you're using them to do.

rugged marsh Oct 17, 2022, 10:17 PM

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I think expand is normally called from Erlang which passes in a pid. Maybe if I pass in the same pid Erlang does it'll be responsive. If that's the case, IEx.Broker.shell() isn't the right one

rugged marsh Oct 17, 2022, 10:17 PM

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spare prairie I don't think they're supposed to do what you're using them to do.

That's a lot of computering, I know dragons be here 😉

spare prairie Oct 17, 2022, 10:18 PM

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i'm wondering if you'll get more mileage out of something like elixir_sense.

rugged marsh Oct 17, 2022, 10:18 PM

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If there's no way to call this function and get a quick return, maybe I can figure out how to use ElixirLS to give me what I need

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Haven't heard of that one, I'll check it out

spare prairie Oct 17, 2022, 10:20 PM

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elixir_sense is used by elixir_ls

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elixir_ls is also not very reusable.

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trust me.

rugged marsh Oct 17, 2022, 10:20 PM

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Gotcha

spare prairie Oct 17, 2022, 10:21 PM

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i'm deep in its code now

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i guess the question I have is where does your shell context come from without a shell?

rugged marsh Oct 17, 2022, 10:42 PM

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This pretty much does what I need. The first call is slow but subsequent calls are fast. I can live with that

spare prairie Oct 19, 2022, 4:39 PM

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nice.

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nitpick...

str
|> ElixirSense.suggestions(0, len + 1)
|> Enum.map(& &1.name)

#IEx.Autocomplete.expand slow when called manually