Painfully slow in rspec with version 0.9.36

[manaka]

We have couple tests using i18n-tasks ( https://gist.github.com/manaka/2a6f32b11853f1f31709247ed682403f )
After update from 0.9.35 to 0.9.36 it takes 73 minutes to finish this tests, before update it takes 1 and half minute.
Also same problem with 0.9.35 if switch ruby from 2.7.3 to 3.0.3 or 3.0.2
What can i do to try find source of the problem?

[glebm]

You can run i18n-tasks under a profiler, such as rbspy or ruby-prof, to identify where it is spending all this time

[glebm]

Install rbspy per these instructions https://rbspy.github.io/

Then, run:

rbspy record bundle exec i18n-tasks health

[manaka]

That's what I gets:

Time since start: 2410s. Press Ctrl+C to stop.
  Summary of profiling data so far:
% self  % total  name
46.12    94.78  block (2 levels) in associate - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/builders/default.rb
25.03    48.66  == - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/ast-2.4.2/lib/ast/node.rb
19.94    19.94  == [c function] - (unknown)
2.85    97.64  upto [c function] - (unknown)
2.31     2.31  respond_to? [c function] - (unknown)
0.76     0.76  to_ast - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/ast-2.4.2/lib/ast/node.rb
0.61     1.53  advance - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/lexer.rb
0.54     0.54  equal? [c function] - (unknown)
0.22    99.85  _racc_do_parse_c [c function] - (unknown)
0.15     0.15  [] [c function] - (unknown)
0.10     0.21  tok - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/lexer.rb
0.10     0.10  hash [c function] - (unknown)
0.10     0.10  (unknown) [c function] - (unknown)
0.09     0.51  new [c function] - (unknown)
0.09     0.17  initialize - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/lexer/literal.rb
0.06     0.19  nest_and_try_closing - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/lexer/literal.rb
0.05     0.11  emit - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/lexer.rb
0.04     0.04  extend_string - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/lexer/literal.rb
0.04     0.18  slice - /Users/manaka/Work/awesome_project/vendor/cache/ruby/2.7.0/gems/parser-3.0.3.2/lib/parser/source/buffer.rb
0.04     0.04  b [c function] - (unknown)
✓ Perfect! Every translation is in use.
  ✓ Well done! No inconsistent interpolations found.
    ✓ Good job! All data is normalized
Wrote raw data to /Users/manaka/.cache/rbspy/records/rbspy-2021-12-22-EuQCN5aHkn.raw.gz
Wrote formatted output to /Users/manaka/.cache/rbspy/records/rbspy-2021-12-22-VbJlgvvQqt.flamegraph.svg

More readable: https://gist.github.com/manaka/34c15488d22bfab383bc9fcb1fd26820

[manaka]

I find out that parser update (3.0.2.0 → 3.0.3.2) is breaking working before 0.9.35

[glebm]

@manaka Please file an issue in https://github.com/whitequark/parser/

More readable: gist.github.com/manaka/34c15488d22bfab383bc9fcb1fd26820

I've edited your comment to use triple backticks instead of a single backtick and now it's readable here as well

[levidavidmurray]

I can confirm that downgrading parser to 3.0.2.0 reduced my I18n::Tasks::MissingKeys times from 210 seconds to only 10 seconds

Thank you @manaka! There was an issue regarding performance opened in the parser repo two weeks ago. I mentioned the difference between the two versions there.

[glebm]

Fixed in parser version 3.2.2.1, see whitequark/parser#924