there is already a package with the GC part of EKG
@yihuang what's your opinion of gc-monitoring-wai versus ekg?
If we only concern about a gc monitering library, then gc-monitoring-wai is enough, and it's a deadly simple package with only 55 lines of code.
But ekg also provide common constructs to write custom counters and gauges, personally i don't have requirement for that, that's why i didn't create a ekg port library, but i can't speak for others.
Probably there should be a note to yesod-ekg: if you just want gc you can use gc-monitoring-wai
The custom counter & gauges functionality is definitely desirable. However, the current setup is in memory, which is limited (you can't count things across multiple app servers, etc). But at that point maybe one should just switch to an existing tool like statsd and having ekg counters is a good stepping stone.
This is a similar project: https://github.com/wmoss/StatsWeb