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perf(ui): reduce allocation overhead when encoding "redraw" events

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Note for external UIs: Nvim can now emit multiple "redraw" event batches
before a final "flush" event is received. To retain existing behavior,
clients should make sure to update visible state at an explicit "flush"
event, not just the end of a "redraw" batch of event.

* Get rid of copy_object() blizzard in the auto-generated ui_event layer
* Special case "grid_line" by encoding screen state directly to
  msgpack events with no intermediate API events.
* Get rid of the arcane notion of referring to the screen as the "shell"
* Array and Dictionary are kvec_t:s, so define them as such.
* Allow kvec_t:s, such as Arrays and Dictionaries, to be allocated with
  a predetermined size within an arena.
* Eliminate redundant capacity checking when filling such kvec_t:s
  with values.
This commit is contained in:
bfredl
2022-06-08 22:02:02 +02:00
parent b2ed439bd5
commit 5d69872105
22 changed files with 614 additions and 271 deletions
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10
src/nvim/normal.c
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@@ -2755,13 +2755,13 @@ static void display_showcmd(void)
showcmd_is_clear = (len == 0);
if (ui_has(kUIMessages)) {
Array content = ARRAY_DICT_INIT;
MAXSIZE_TEMP_ARRAY(content, 1);
MAXSIZE_TEMP_ARRAY(chunk, 2);
if (len > 0) {
Array chunk = ARRAY_DICT_INIT;
// placeholder for future highlight support
ADD(chunk, INTEGER_OBJ(0));
ADD(chunk, STRING_OBJ(cstr_to_string((char *)showcmd_buf)));
ADD(content, ARRAY_OBJ(chunk));
ADD_C(chunk, INTEGER_OBJ(0));
ADD_C(chunk, STRING_OBJ(cstr_as_string((char *)showcmd_buf)));
ADD_C(content, ARRAY_OBJ(chunk));
}
ui_call_msg_showcmd(content);
return;