Ale: tsserver linter freezes vim for 20 seconds after fresh start

[janhellmich]

👋when first opening a .ts(x) file after a fresh vim start running the linter freezes vim for about 20 seconds for me. The only enabled linter for TS I have is tsserver.

If I open a .ts(x) file and don't do anything that triggers the linter for ~20 seconds no such freezing exists.

Added ALEInfo and profile of the delay/freeze below. Lmk if there is anything else I can provide. Thanks :)

ALEInfo

 Current Filetype: typescript
Available Linters: ['eslint', 'tslint', 'tsserver', 'typecheck']
  Enabled Linters: ['tsserver']
 Suggested Fixers:
  'eslint' - Apply eslint --fix to a file.
  'prettier' - Apply prettier to a file.
  'remove_trailing_lines' - Remove all blank lines at the end of a file.
  'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
  'tslint' - Fix typescript files with tslint --fix.
 Linter Variables:
let g:ale_typescript_tsserver_config_path = ''
let g:ale_typescript_tsserver_executable = 'tsserver'
let g:ale_typescript_tsserver_use_global = 0
 Global Variables:
let g:ale_cache_executable_check_failures = v:null
let g:ale_change_sign_column_color = 0
let g:ale_command_wrapper = ''
let g:ale_completion_delay = v:null
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = v:null
let g:ale_echo_cursor = 1
let g:ale_echo_msg_error_str = 'Error'
let g:ale_echo_msg_format = '%code: %%s'
let g:ale_echo_msg_info_str = 'Info'
let g:ale_echo_msg_warning_str = 'Warning'
let g:ale_enabled = 1
let g:ale_fix_on_save = 0
let g:ale_fixers = {'typescript': ['prettier']}
let g:ale_history_enabled = 1
let g:ale_history_log_output = 1
let g:ale_keep_list_window_open = 0
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 1
let g:ale_lint_on_filetype_changed = 1
let g:ale_lint_on_save = 0
let g:ale_lint_on_text_changed = 'always'
let g:ale_lint_on_insert_leave = 0
let g:ale_linter_aliases = {}
let g:ale_linters = {'typescript': ['tsserver']}
let g:ale_linters_explicit = 0
let g:ale_list_window_size = 10
let g:ale_list_vertical = 0
let g:ale_loclist_msg_format = '%code: %%s'
let g:ale_max_buffer_history_size = 20
let g:ale_max_signs = -1
let g:ale_maximum_file_size = v:null
let g:ale_open_list = 0
let g:ale_pattern_options = v:null
let g:ale_pattern_options_enabled = v:null
let g:ale_set_balloons = 0
let g:ale_set_highlights = 1
let g:ale_set_loclist = 1
let g:ale_set_quickfix = 0
let g:ale_set_signs = 1
let g:ale_sign_column_always = 0
let g:ale_sign_error = '>>'
let g:ale_sign_info = '--'
let g:ale_sign_offset = 1000000
let g:ale_sign_style_error = '>>'
let g:ale_sign_style_warning = '--'
let g:ale_sign_warning = '--'
let g:ale_statusline_format = v:null
let g:ale_type_map = {}
let g:ale_use_global_executables = v:null
let g:ale_warn_about_trailing_blank_lines = 1
let g:ale_warn_about_trailing_whitespace = 1

  Command History:
(started) ['sh', '-c', '/Users/janhellmich/src/server/node_modules/.bin/tsserver']

Profile: profile.log

[w0rp]

I know about that issue, and I'm not sure I can do anything about it. The problem is that the call to send data to the server is blocking. I would like it if Vim had a version of ch_sendraw which sent off data without blocking Vim.

[w0rp]

I have fixed this now, _but_ in order for the fix to work, you'll have to update to Vim 8.1, patch 350. You can either compile Vim from source, or wait for someone to provide a binary.

As of today, Vim contains a feature for setting jobs and channels to use non-blocking writes. This now makes it possible for ch_sendraw calls to return immediately. What this means is that ALE doesn't have to block on the calls for messages sent to tsserver, and the freezing goes away.

[janhellmich]

Thank you so much, works amazingly!