perf: much faster async preview

folke · May 10, 2021 · 2c9b319 · 2c9b319
1 parent 0c9ca5e
commit 2c9b319
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Showing 2 changed files with 22 additions and 1 deletion.
diff --git a/lua/trouble/util.lua b/lua/trouble/util.lua
@@ -30,6 +30,23 @@ function M.debounce(ms, fn)
     end
 end
 
+function M.throttle(ms, fn)
+    local timer = vim.loop.new_timer()
+    local running = false
+    return function(...)
+        if not running then
+            local argv = {...}
+            local argc = select('#', ...)
+
+            timer:start(ms, 0, function()
+                running = false
+                pcall(vim.schedule_wrap(fn), unpack(argv, 1, argc))
+            end)
+            running = true
+        end
+    end
+end
+
 M.severity = {
     [0] = "Other",
     [1] = "Error",

diff --git a/lua/trouble/view.lua b/lua/trouble/view.lua
@@ -383,7 +383,7 @@ function View:toggle_fold()
     self:update()
 end
 
-function View:preview()
+function View:_preview()
     if not vim.api.nvim_win_is_valid(self.parent) then return end
     util.debug("preview")
 
@@ -421,4 +421,8 @@ function View:preview()
     end
 end
 
+-- View.preview = View._preview
+
+View.preview = util.throttle(50, View._preview)
+
 return View