Slow rule eval on WSL

[siennathesane]

The output of thefuck --version (something like The Fuck 3.1 using Python 3.5.0 and Bash 4.4.12(1)-release):

% thefuck --version
The Fuck 3.29 using Python 3.8.1 and ZSH 5.4.2

Your system (Debian 7, ArchLinux, Windows, etc.):

% uname -r
4.19.84-microsoft-standard

How to reproduce the bug:

# linuxbrew using latest.
% brew install -v thefuck
% echo 'eval $(thefuck --alias fuck)' >> ~/.zshrc
% source ~/.zshrc

# some repo
% gitstatus
zsh: command not found: gitstatus

# this takes like 30 seconds.
% fuck

The output of The Fuck with THEFUCK_DEBUG=true exported (typically execute export THEFUCK_DEBUG=true in your shell before The Fuck):

 % fuck --debug
DEBUG: Run with settings: {'alter_history': True,
 'debug': True,
 'env': {'GIT_TRACE': '1', 'LANG': 'C', 'LC_ALL': 'C'},
 'exclude_rules': [],
 'history_limit': None,
 'instant_mode': True,
 'no_colors': False,
 'num_close_matches': 3,
 'priority': {},
 'repeat': False,
 'require_confirmation': True,
 'rules': [<const: All rules enabled>],
 'slow_commands': ['lein', 'react-native', 'gradle', './gradlew', 'vagrant'],
 'user_dir': PosixPath('/c/Users/MikeLloyd/.config/thefuck'),
 'wait_command': 3,
 'wait_slow_command': 15}
[WARN] PS1 doesn't contain user command mark, please ensure that PS1 is not changed after The Fuck alias initialization
DEBUG: Importing rule: adb_unknown_command; took: 0:00:00.000184
DEBUG: Importing rule: ag_literal; took: 0:00:00.000366
DEBUG: Importing rule: apt_get; took: 0:00:00.001400
DEBUG: Importing rule: apt_get_search; took: 0:00:00.000299
DEBUG: Importing rule: apt_invalid_operation; took: 0:00:00.000714
DEBUG: Importing rule: apt_list_upgradable; took: 0:00:00.000370
DEBUG: Importing rule: apt_upgrade; took: 0:00:00.000391
DEBUG: Importing rule: aws_cli; took: 0:00:00.000239
DEBUG: Importing rule: az_cli; took: 0:00:00.000561
DEBUG: Importing rule: brew_cask_dependency; took: 0:00:00.000493
DEBUG: Importing rule: brew_install; took: 0:00:00.000110
DEBUG: Importing rule: brew_link; took: 0:00:00.000261
DEBUG: Importing rule: brew_reinstall; took: 0:00:00.000484
DEBUG: Importing rule: brew_uninstall; took: 0:00:00.000239
DEBUG: Importing rule: brew_unknown_command; took: 0:00:00.000131
DEBUG: Importing rule: brew_update_formula; took: 0:00:00.000234
DEBUG: Importing rule: cargo; took: 0:00:00.000087
DEBUG: Importing rule: cargo_no_command; took: 0:00:00.000237
DEBUG: Importing rule: cat_dir; took: 0:00:00.000262
DEBUG: Importing rule: cd_correction; took: 0:00:00.001040
DEBUG: Importing rule: cd_mkdir; took: 0:00:00.000368
DEBUG: Importing rule: cd_parent; took: 0:00:00.000089
DEBUG: Importing rule: chmod_x; took: 0:00:00.000093
DEBUG: Importing rule: composer_not_command; took: 0:00:00.000252
DEBUG: Importing rule: cp_omitting_directory; took: 0:00:00.000365
DEBUG: Importing rule: cpp11; took: 0:00:00.000296
DEBUG: Importing rule: dirty_untar; took: 0:00:00.000876
DEBUG: Importing rule: dirty_unzip; took: 0:00:00.001614
DEBUG: Importing rule: django_south_ghost; took: 0:00:00.000222
DEBUG: Importing rule: django_south_merge; took: 0:00:00.000233
DEBUG: Importing rule: dnf_no_such_command; took: 0:00:00.085171
DEBUG: Importing rule: docker_login; took: 0:00:00.000305
DEBUG: Importing rule: docker_not_command; took: 0:00:00.083238
DEBUG: Importing rule: dry; took: 0:00:00.000133
DEBUG: Importing rule: fab_command_not_found; took: 0:00:00.000454
DEBUG: Importing rule: fix_alt_space; took: 0:00:00.000304
DEBUG: Importing rule: fix_file; took: 0:00:00.001708
DEBUG: Importing rule: gem_unknown_command; took: 0:00:00.013975
DEBUG: Importing rule: git_add; took: 0:00:00.000560
DEBUG: Importing rule: git_add_force; took: 0:00:00.000243
DEBUG: Importing rule: git_bisect_usage; took: 0:00:00.000315
DEBUG: Importing rule: git_branch_delete; took: 0:00:00.000273
DEBUG: Importing rule: git_branch_exists; took: 0:00:00.000307
DEBUG: Importing rule: git_branch_list; took: 0:00:00.000250
DEBUG: Importing rule: git_checkout; took: 0:00:00.000249
DEBUG: Importing rule: git_commit_amend; took: 0:00:00.000231
DEBUG: Importing rule: git_commit_reset; took: 0:00:00.000262
DEBUG: Importing rule: git_diff_no_index; took: 0:00:00.000296
DEBUG: Importing rule: git_diff_staged; took: 0:00:00.000367
DEBUG: Importing rule: git_fix_stash; took: 0:00:00.000320
DEBUG: Importing rule: git_flag_after_filename; took: 0:00:00.000329
DEBUG: Importing rule: git_help_aliased; took: 0:00:00.000309
DEBUG: Importing rule: git_merge; took: 0:00:00.000267
DEBUG: Importing rule: git_merge_unrelated; took: 0:00:00.000251
DEBUG: Importing rule: git_not_command; took: 0:00:00.000336
DEBUG: Importing rule: git_pull; took: 0:00:00.000260
DEBUG: Importing rule: git_pull_clone; took: 0:00:00.000250
DEBUG: Importing rule: git_pull_uncommitted_changes; took: 0:00:00.000264
DEBUG: Importing rule: git_push; took: 0:00:00.000240
DEBUG: Importing rule: git_push_different_branch_names; took: 0:00:00.000227
DEBUG: Importing rule: git_push_force; took: 0:00:00.000231
DEBUG: Importing rule: git_push_pull; took: 0:00:00.000270
DEBUG: Importing rule: git_push_without_commits; took: 0:00:00.000288
DEBUG: Importing rule: git_rebase_merge_dir; took: 0:00:00.000249
DEBUG: Importing rule: git_rebase_no_changes; took: 0:00:00.000221
DEBUG: Importing rule: git_remote_delete; took: 0:00:00.000247
DEBUG: Importing rule: git_remote_seturl_add; took: 0:00:00.000184
DEBUG: Importing rule: git_rm_local_modifications; took: 0:00:00.000264
DEBUG: Importing rule: git_rm_recursive; took: 0:00:00.000302
DEBUG: Importing rule: git_rm_staged; took: 0:00:00.000233
DEBUG: Importing rule: git_stash; took: 0:00:00.000233
DEBUG: Importing rule: git_stash_pop; took: 0:00:00.000260
DEBUG: Importing rule: git_tag_force; took: 0:00:00.000247
DEBUG: Importing rule: git_two_dashes; took: 0:00:00.000287
DEBUG: Importing rule: go_run; took: 0:00:00.000273
DEBUG: Importing rule: gradle_no_task; took: 0:00:00.001183
DEBUG: Importing rule: gradle_wrapper; took: 0:00:00.000379
DEBUG: Importing rule: grep_arguments_order; took: 0:00:00.000346
DEBUG: Importing rule: grep_recursive; took: 0:00:00.000372
DEBUG: Importing rule: grunt_task_not_found; took: 0:00:00.000639
DEBUG: Importing rule: gulp_not_task; took: 0:00:00.000453
DEBUG: Importing rule: has_exists_script; took: 0:00:00.000285
DEBUG: Importing rule: heroku_multiple_apps; took: 0:00:00.000331
DEBUG: Importing rule: heroku_not_command; took: 0:00:00.000280
DEBUG: Importing rule: history; took: 0:00:00.000137
DEBUG: Importing rule: hostscli; took: 0:00:00.000420
DEBUG: Importing rule: ifconfig_device_not_found; took: 0:00:00.000410
DEBUG: Importing rule: java; took: 0:00:00.000240
DEBUG: Importing rule: javac; took: 0:00:00.000303
DEBUG: Importing rule: lein_not_task; took: 0:00:00.000436
DEBUG: Importing rule: ln_no_hard_link; took: 0:00:00.000293
DEBUG: Importing rule: ln_s_order; took: 0:00:00.000463
DEBUG: Importing rule: long_form_help; took: 0:00:00.000143
DEBUG: Importing rule: ls_all; took: 0:00:00.000348
DEBUG: Importing rule: ls_lah; took: 0:00:00.000425
DEBUG: Importing rule: man; took: 0:00:00.000327
DEBUG: Importing rule: man_no_space; took: 0:00:00.000124
DEBUG: Importing rule: mercurial; took: 0:00:00.000345
DEBUG: Importing rule: missing_space_before_subcommand; took: 0:00:00.000105
DEBUG: Importing rule: mkdir_p; took: 0:00:00.000289
DEBUG: Importing rule: mvn_no_command; took: 0:00:00.000323
DEBUG: Importing rule: mvn_unknown_lifecycle_phase; took: 0:00:00.000367
DEBUG: Importing rule: no_command; took: 0:00:00.000398
DEBUG: Importing rule: no_such_file; took: 0:00:00.000180
DEBUG: Importing rule: npm_missing_script; took: 0:00:00.063259
DEBUG: Importing rule: npm_run_script; took: 0:00:00.000315
DEBUG: Importing rule: npm_wrong_command; took: 0:00:00.000378
DEBUG: Importing rule: open; took: 0:00:00.000335
DEBUG: Importing rule: pacman; took: 0:00:00.231445
DEBUG: Importing rule: pacman_not_found; took: 0:00:00.000160
DEBUG: Importing rule: path_from_history; took: 0:00:00.000129
DEBUG: Importing rule: php_s; took: 0:00:00.000312
DEBUG: Importing rule: pip_install; took: 0:00:00.000308
DEBUG: Importing rule: pip_unknown_command; took: 0:00:00.000300
DEBUG: Importing rule: port_already_in_use; took: 0:00:00.000678
DEBUG: Importing rule: prove_recursively; took: 0:00:00.000411
DEBUG: Importing rule: pyenv_no_such_command; took: 0:00:00.080183
DEBUG: Importing rule: python_command; took: 0:00:00.000285
DEBUG: Importing rule: python_execute; took: 0:00:00.000244
DEBUG: Importing rule: quotation_marks; took: 0:00:00.000087
DEBUG: Importing rule: react_native_command_unrecognized; took: 0:00:00.000309
DEBUG: Importing rule: remove_trailing_cedilla; took: 0:00:00.000127
DEBUG: Importing rule: rm_dir; took: 0:00:00.000255
DEBUG: Importing rule: rm_root; took: 0:00:00.000272
DEBUG: Importing rule: scm_correction; took: 0:00:00.000289
DEBUG: Importing rule: sed_unterminated_s; took: 0:00:00.000260
DEBUG: Importing rule: sl_ls; took: 0:00:00.000130
DEBUG: Importing rule: ssh_known_hosts; took: 0:00:00.000262
DEBUG: Importing rule: sudo; took: 0:00:00.000120
DEBUG: Importing rule: sudo_command_from_user_path; took: 0:00:00.000261
DEBUG: Importing rule: switch_lang; took: 0:00:00.000167
DEBUG: Importing rule: systemctl; took: 0:00:00.000388
DEBUG: Importing rule: test.py; took: 0:00:00.000100
DEBUG: Importing rule: tmux; took: 0:00:00.000286
DEBUG: Importing rule: touch; took: 0:00:00.000509
DEBUG: Importing rule: tsuru_login; took: 0:00:00.000273
DEBUG: Importing rule: tsuru_not_command; took: 0:00:00.000245
DEBUG: Importing rule: unknown_command; took: 0:00:00.000114
DEBUG: Importing rule: unsudo; took: 0:00:00.000108
DEBUG: Importing rule: vagrant_up; took: 0:00:00.000251
DEBUG: Importing rule: whois; took: 0:00:00.000368
DEBUG: Importing rule: workon_doesnt_exists; took: 0:00:00.000312
DEBUG: Importing rule: yarn_alias; took: 0:00:00.000248
DEBUG: Importing rule: yarn_command_not_found; took: 0:00:00.086066
DEBUG: Importing rule: yarn_command_replaced; took: 0:00:00.000458
DEBUG: Importing rule: yarn_help; took: 0:00:00.000263
DEBUG: Trying rule: dirty_unzip; took: 0:00:00.000111
No fucks given
DEBUG: Total took: 0:00:27.193200

If the bug only appears with a specific application, the output of that application and its version:

It seems to be slow regardless.

Anything else you think is relevant:

I'm not really sure what would cause it to evaluate slowly, each rule import and eval only takes a couple milliseconds, so it's not the eval it feels like there's a 20 second wait for it to spin up before it starts evaluating.

[siennathesane]

I also tried this with instance mode disabled and had the same results.

[B3Kay]

I have the same issue, Just installed TheFuck on my wsl 2 ubuntu, on windows 10 and it's pritty slow. Takes a few seconds beofore something happens.

[dopdahl16]

I also have the same issue with WSL on Windows 10 and The Fuck 3.29 using Python 3.6.9 and Bash 4.4.20(1)-release
From purely anecdotal experience, it seems like git commands take the longest for fuck to return options.

[siennathesane]

So I've noticed overall that WSL2 is just slower when it's running on a spindle, so I'm chalking my performance up to that. I'm going to move it from my spindle to a solid state this week and see if that resolves my problem.

[PePoDev]

Same problem on WSL 2 ubuntu 18.04
Install with pip3

$ thefuck --version
The Fuck 3.30 using Python 3.8.2 and ZSH 5.8

[flawiddsouza]

I'm on a SSD and it's still pretty slow. Takes like 10-20 seconds to return anything.

[nasht]

Same issue as the folks above. Ubuntu 18 and 20 on WSL, and thefuck is thefucking slow :)

[miking-the-viking]

• WSL2
• The Fuck 3.30
• Python 3.8.2
• ZSH 5.8
• Windows 10 19041.329
• i9-9900K
• 32 GB DDR4 4000
• Samsung 970 EVO Plus 2TB internal NVMe SSD

.... It's not a machine performance issue as far as I can deduce.

thefuck test 0.44s user 0.49s system 22% cpu 4.217 total -

I've just reformatted my pc from the Insiders to Stable (as WSL2 is on the stable release) and have noticed a marked improvement to thefuck response time. However it is still nothing like when on OS X or native Linux.

[kimlym]

Hey guys, I figured this out. it's irrelevant to thefuck but your wsl machine.

Try echo $PATH and you probably gonna see a long list there, and that's the reason the fuck is so slow. You can do what's suggested here, microsoft/WSL#1640 (comment), and restart your linux distro.

After that thefuck runs smooth as fuck for me

Beware your vscode would be gone after that, so probably do which code first

[dopdahl16]

Testing @kimlym 's solution:
$ echo $PATH
I'm going to refrain from displaying my entire PATH for privacy reasons, but mine had 34 entries.
I ran 10 tests of thefuck using the following sequence:

my_user@my_machine:/some/non-git/directory$ git staus
git: 'staus' is not a git command. See 'git --help'.
The most similar command is
status
my_user@my_machine:/some/non-git/directory$ time fuck
git status [enter/↑/↓/ctrl+c]
fatal: not a git repository
real XmX.XXs
user XmX.XXs
sys XmX.XXs

The average of the user times was: 0.336
The average of the sys times was: 1.7954
We don't care about the real time since that includes I/O. To better understand the output of time, see here

After removing the appended Windows path as @kimlym suggested here , running $ echo $PATH now only returns 11 entries.
Repeating the same sequence of tests:
The average of the user times was: 0.2032
The average of the sys times was: 0.2157

This represents a 40% reduction in user time, and a 88% reduction in sys time.
So it does seem like shortening the PATH does help thefuck run faster.

However, it would be desirable for thefuck to run quickly with a longer PATH... Maybe investigating into why there is such a large increase in sys time for a longer PATH would lead to something promising?

[PePoDev]

Problem when remove path env on Windows side is VSCode can't open in command.

$ which code
/c/Program Files/Microsoft VS Code/bin/code

[kimlym]

@PePoDev you can add that to your path in your bashrc or w/e shell file, something like this

PATH=$PATH:/c/Program Files/Microsoft VS Code/bin/code

Might need an export on that. And for my case it's /mnt/c