Linear:
https://linear.app/zed-industries/issue/Z-2578/zed-launches-very-slow-for-user
I was searching for the cause of a slow startup time reported in the
above issue, and I don't think I found it, but I did find two very
noticeable slow code paths while profiling, and fixed them.
### Notes
1. When starting the JSON language server, we provide it with a JSON
schema for our settings. For the `theme` setting, the JSON schema needs
to read all of the themes in the registry, to generate a list of valid
theme names. Previously, as part of this, we were deserializing each
theme from JSON, which took a lot of CPU. Now, we don't do that.
2. When an FS event occurs within a git repository, we reload the git
status for all entries in that git repository. Previously, we did that
via a separate `libgit2` call per FS entry (including ignored entries,
so many thousands in the case of the `zed` repo). Now we do one
`libgit2` call, asking for all of the statuses. Git carries an index of
all of the files with statuses, so this is fast.
Release Notes:
- Improved the the performance of starting up a JSON language server.
- Improved the performance of handling changes to git repositories, such
as changing branches or committing.
Closes https://github.com/zed-industries/community/issues/75
Closes https://github.com/zed-industries/community/issues/1749
The PR
* changes keybindings for `Editor && mode == auto_height` context:
before, `alt-enter` and `alt-shift-enter` added new lines in such
editors, including the one from buffer search.
New bindings are the same as in `Editor && mode == full` context.
* adds `search::SelectAllMatches` action and binds it to `Alt + Enter`
by default, to select all matches of a buffer search
The behavior mimics VSCode: we do not move the screen even if all
selections are out of the visible range (Cmd+G will navigate there) and
allow reselecting the results from both pane and search field, as long
as the search is not dismissed.
Release Notes:
- Added `search::SelectAllMatches` (`Alt + Enter` default) action to
place carets and select all buffer search results
([#75](https://github.com/zed-industries/community/issues/75),
[#1749](https://github.com/zed-industries/community/issues/1749)).
We're finally doing the thing.
TODO:
- [x] Choose an approach
- Decided to add a new element just for the pane axis, containing a
slimmed down copy of the flex code.
- [x] Wire through callbacks and pointers so that data goes where it
needs to
- [x] Do the flex juggling math on resize
- [x] Update the flexes when updating the split tree
- [x] Restore the active_pane_magnification setting
- [x] Serialize an axis' flexes
Release Notes:
- Made the center pane group splits resizable. Note that resizing is
disabled if the `active_pane_magnification` setting is changed from
default.
Deals with https://github.com/zed-industries/community/issues/752
Deals with https://github.com/zed-industries/community/issues/566
Currently, when converting from LSP to Zed objects, completions with
non-empty `additional_text_edits` are filtered out.
Later, all other completions form a list and the selected one gets the
`Editor::confirm_completion` call, which always queries an LSP
completion resolve request to get the `additional_text_edits` field.
Otherwise, `additional_text_edits` field is ignored entirely for the
rest of the completion lifetime — and we always pass the selected
completion through the resolve request.
The PR changes the logic, removing the `additional_text_edits` filtering
and instead of resolving every completion, now we check for
`additional_text_edits` in the completion before resolving: resolve
happens only if the data is absent.
Generally, feels like resolve has to happen before the completion
selection: LSP servers may send us markdown for completion documentation
preview pop ups and similar extra info.
Also, the server may lack resolve capabilities entirely, always sending
the request seems dangerous.
For now, the PR does not attempt to change either.
Release Notes:
- Brings rust-analyzer's postfix completions and others completions with
preresolved additional text edits
Piotr Osiewicz