pass is 15x slower on one machine than another. How to debug?

[Ryan Lue]

>>> Hi,
>>>
>>> Suddenly, pass is v. slow on my desktop.
>>>
>>>     $ time pass ls
>>>
>>> shows 0.6s on my desktop vs. 0.04s on my laptop.
>>> Both are comparably specced and running
>>> nearly identical installations of Debian buster. 
>>>
>>> This only began a week or so ago, but for the life of me,
>>> I can’t figure out what change caused it.
>>>
>>> Any suggestions re: how to debug this performance issue?
>>>
>>> —Ryan
>>>
>>> P.S. Thanks for an amazing utility.
>>> _______________________________________________
>>> Password-Store mailing list
>>> Password-Store at lists.zx2c4.com
>>> https://lists.zx2c4.com/mailman/listinfo/password-store
>> Interesting, problem. I would suggest looking at running perf:
>> ``perf stat -d pass ls``
>> Or try using perf record the attempt, then use perf report to analyze
>> it. While perf has its limitations it is likely to work on your Debian
>> machine out of the box.
>> Aside from that perhaps even using strace to see what is being done and
>> could be failing or taking in in an attempt to do something. Problems
>> like this are usually pretty fun to dig into, and will usually be very
>> insightful into your system.
>> Without more information or data I don't think we could give you
>> anything to fix the issue you are having (maybe someone else knows more
>> than me though!).
>>
>> Good luck
>> -Kevin
>>
>> _______________________________________________
>> Password-Store mailing list
>> Password-Store at lists.zx2c4.com
>> https://lists.zx2c4.com/mailman/listinfo/password-store
> Perhaps running pass directly with bash -x (it shows the whole execution
> flow) could be helpful, combined with perf.
> 
> Cheers!
> 
> On 2/15/19 3:34 PM, Kevin Faulkner wrote:
> 
> -- 
> HacKan || Iván
> GPG: 0x35710D312FDE468B
>
> _______________________________________________
> Password-Store mailing list
> Password-Store at lists.zx2c4.com
> https://lists.zx2c4.com/mailman/listinfo/password-store

Thanks for the suggestions.
Here’s the output of perf in a `bash -x` session.

(From what I can tell, the bulk of the output from the -x flag
is for two plugins I use, direnv and tmux-git.
FWIW, these are both also installed on my laptop, where pass runs way faster.)

    $ perf stat -d pass ls
    + perf stat -d pass ls
    Password Store
    ├── [redacted]
    ...
    
     Performance counter stats for 'pass ls':
    
                572.73 msec task-clock                 #    1.006 CPUs utilized
                    51      context-switches           #   89.161 M/sec
                     6      cpu-migrations             #   10.490 M/sec
                10,540      page-faults                # 18426.573 M/sec
         1,468,509,401      cycles                     # 2567324.128 GHz                      (48.02%)
         2,020,963,274      instructions               #    1.38 insn per cycle               (60.65%)
           459,226,959      branches                   # 802844333.916 M/sec                  (75.00%)
            14,503,153      branch-misses              #    3.16% of all branches             (75.75%)
           644,024,031      L1-dcache-loads            # 1125916138.112 M/sec                 (69.60%)
            21,528,339      L1-dcache-load-misses      #    3.34% of all L1-dcache hits       (24.21%)
             5,777,864      LLC-loads                  # 10101160.839 M/sec                   (24.15%)
               430,711      LLC-load-misses            #    7.45% of all LL-cache hits        (35.99%)
    
           0.569333694 seconds time elapsed
           
           0.535859000 seconds user
           0.038507000 seconds sys
    
    
    ++ _direnv_hook
    ++ local previous_exit_status=0
    +++ /usr/bin/direnv export bash
    ++ eval ''
    ++ return 0
    ++ update_tmux
    ++++ pwd
    +++ readlink -e /home/rlue/.config
    ++ CWD=/home/rlue/.config/
    ++ LASTREPO_LEN=19
    ++ [[ -n /home/rlue/.config/ ]]
    ++ '[' /home/rlue/.config/ = /home/rlue/.config/ ']'
    ++ GIT_REPO=/home/rlue/.config/
    ++ find_git_branch /home/rlue/.config/
    ++ head='ref: refs/heads/master'
    ++ [[ ref: refs/heads/master == ref:\ refs/heads/* ]]
    ++ GIT_BRANCH=master
    ++ find_git_stash /home/rlue/.config/
    ++ '[' -e /home/rlue/.config//.git/refs/stash ']'
    ++ GIT_STASH=
    ++ find_git_dirty
    +++ git status --porcelain
    ++ local 'status= M .profile M .tmux.conf M mutt/mailcap'
    ++ [[ M .profile M .tmux.conf M mutt/mailcap != '' ]]
    ++ GIT_DIRTY='*'
    ++ GIT_FLAGS=($GIT_STASH)
    ++ TMUX_STATUS_DEFINITION
    +++ basename /home/rlue/.config/
    ++ TMUX_STATUS='#[fg=green].config#[fg=white]::#[fg=blue]master '
    ++ '[' 0 -gt 0 ']'
    ++ '[' '*' = '*' ']'
    +++ echo '#[fg=green].config#[fg=white]::#[fg=blue]master '
    +++ sed s/=green/=red/
    +++ sed s/=blue/=brightred/
    ++ TMUX_STATUS='#[fg=red].config#[fg=white]::#[fg=brightred]master '
    ++ tmux set-window-option status-left '#[fg=red].config#[fg=white]::#[fg=brightred]master'

—Ryan