Tuning Ruby's GC params for faster `sup`

[Aravind Narayanan]

Hey everyone,

I'm sharing this to see if any else does this, and whether or not it makes

sense to include in the defaults.

`sup` was kind of slow for me, and sometimes took a few seconds to open up an

(albeit large) email thread. I ran `perftools.rb` on it to see what was taking

up so much time, and was surprised to find that ~ 60% of wallclock time was

spent in GC.

So, I tuned Ruby's GC to not run so often, resulting in GC now taking only 13%

of wall clock time. Anecdotally, I also noticed that threads loaded much much

faster. The params I set are https://gist.github.com/rvnd/756d6a5e82d1bba9fbb9.

Anyone else notice this? Are there any other tricks people use to speed up

`sup`?

Regards, 

Aravind