twilio-ruby freeing too many memory slots

[gemfarmer]

This is a memory issue and is potentially related to #396.

I recently added the twilio-ruby gem to our rails application and suddenly started experiencing memory issues. Not only did our project's average memory usage increased (from stabilizing at ~500 MB to ~700/750MB), but our application started freeing up a ton of memory slots. Below are two charts of Free Memory Slots, based on heroku's runtime metrics.

Usage without twilio-ruby gem added:

Usage with twilio-ruby gem added:

Keep in mind that 50,000 free memory slots isn't too concerning. When I was actively using the gem, the number of free slots was quite a bit higher, sometims 600k+. All of this wouldn't be too concerning if my overall memory usage wasn't spiking, but as it is, I'm assuming that this is related.

Memory usage

With regards to #396, I'm not seeing the crazy numbers reported for twilio-ruby

Here is mine with a few other gems for comparison:

> bundle exec derailed bundle:mem
rails: 9.5508 MiB (Also required by: active_record/railtie, active_model/railtie, and 13 others)
twilio-ruby: 11.2109 MiB
pg: 3.8047 MiB
devise: 1.6914 MiBaction_dispatch/middleware/stack)

Version:
gem 'twilio-ruby', '~> 5.14', '>= 5.14.1'

Steps to Reproduce

1. Add it to your Rails Project
2. Add project to Heroku
3. Follow steps here to add Ruby runtime Metrics

[philnash]

Oh wow, this is interesting. Thank you for the in depth report. I've been planning a look at the memory usage (as you'll have seen in #396) but not had the chance yet. This is another good reason to dig in though. I'll try to get this onto my schedule in the next few weeks.

[gemfarmer]

Thanks @philnash. What other information do you need to dig into it more?

[acflint]

+1 on this. Came here looking for any one else reporting memory issues. Thank you @philnash for getting it on the schedule!

[gemfarmer]

@philnash any update on this?

[philnash]

I've updated #396. Would be interested to see if that work has helped here too. Any testing and feedback would be appreciated.

[gemfarmer]

@philnash thanks for updating. I'll test as soon as possible!