Reduce hover actions delay

[mizlan]

Feature description

There is a noticeable delay on hover (i.e., pressing K). Can it be made instantaneous?

[mrcjkb]

Hey 👋

By default, haskell-tools replaces the built-in hover handler with one that provides additional actions, like 'hoogle search for signature', etc.

Some of those actions require a request to haskell-language-server, to determine if they are possible. Those may be causing the delay for you. Currently, there is no way to disable only those hover actions. I will look into that when I have some time.

Until then, you can tell haskell-tools to use Neovim's builtin hover with the tools.hover.enable config (see :h haskell-tools.config).

[mrcjkb]

🤔 Come to think of it, maybe I can reduce the delay by sending multiple requests asynchronously and using coroutines to gather the responses.

[mrcjkb]

@mizlan do you have a GIF or an asciinema recording showing how severe the delay is for you? Is it always a noticeable delay, or just certain hovers (e.g. ones with lots of hover actions)?

[mizlan]

Sorry, the delay is not severe at all, under 200ms probably but definitely noticeable when coming from e.g. ocamllsp. There are just the normal hover actions like search with hoogle etc.

[mrcjkb]

Sorry, the delay is not severe at all, under 200ms probably but definitely noticeable when coming from e.g. ocamllsp. There are just the normal hover actions like search with hoogle etc.

🤔 How is it with vim.g.haskell_tools.tools.hover.enable set to false, using the built-in hover?

[mizlan]

Never mind, the delay must've been a one-off occurrence. It is speedy now and dissimilar to the other time I experienced it.

I also can't seem to disable it using that variable, but also I'm using Lazy which from what I read in your blogpost you are potentially not the biggest fan of

Config is here: https://github.com/mizlan/dotfiles/blob/0ecbc8e0f634b17f3c256ea99d95917ab3b4f06a/nvim/.config/nvim/init.lua#L401-L406

[mrcjkb]

Never mind, the delay must've been a one-off occurrence.

That probably means it's not easily reproducible 🤔 I'll close it for now. Feel free to reopen if you come across it again 😃

I also can't seem to disable it using that variable, but also I'm using Lazy which from what I read in your blogpost you are potentially not the biggest fan of

I don't use lazy.nvim personally, but I wouldn't say I'm not a fan. I'm just not a fan of the problem it tries to solve 😅

Ah, you're calling require('haskell-tools') (which causes the config to be initialised) before setting the config, so it doesn't get picked up.

You can change the signature of your on_attach function to

on_attach = function(_client, bufnr, ht)

and remove the require.

I should probably make the haskell-tools module lazy in its fields to prevent that.