slowing down my test suite by factor 15

[krtschmr]

Finished in 47.38 seconds (files took 5.35 seconds to load)
567 examples, 0 failures

vs.

Finished in 6 minutes 9 seconds (files took 5.45 seconds to load)
567 examples, 0 failures

well, that escalated quickly.
i wonder how we can speed that up for our test suite? send out emails without bootstrap? can't really be an option for a test suite somehow.

[krtschmr]

class ApplicationMailer
  layout Rails.env.test? ? false : 'mailer'


  if Rails.env.test?
    def make_bootstrap_mail(args)
      mail(args)
    end
  end

well, this is the quick hotfix. don't use the layout to send mails and just mock the make_bootstrap_mail and let it do default.

i wonder - did nobody ever had this issue before or do people not test their emails?

[majksner]

I'm experiencing similar issue when sending a newsletter with Sidekiq, 50 emails get processed quickly then queue is stuck to 1 or 2 minutes and then it starts working again and so on.

[gresbtim]

@majksner i never figured out why. the compilation of the bootstrap is insanely slow, but once you have it, it should be done and persist 🤷

[majksner]

This might not be related to this gem. I'm using mailgun in production but when I use config.action_mailer.delivery_method = :letter_opener_web in development I don't experience any slowdowns. I'll test more and report.

[EyMaddis]

I also just tested it (via CLI). It takes >3seconds for compiling. How it take so long to transpile one html format to another?

For me that is ok, I just compile it before deploying. But this is still quite extreme. Especially in development, where I recompile on every changes and the browser preview has a very noticeable delay.

[stuyam]

Performance is important, it is something we are constantly trying to improve. After more of the new alpha 1.0.0 version is solidified performance will become a bigger priority 👍