Is this deliberate? Could we change it for 3.6 so PyGC_Collect does take 
`enabled` into account?

Context: we’re experimenting with disabling the gc entirely for some workloads 
because it doesn’t fare too well with Copy-on-Write on Linux. What ends up 
happening is that disabling the gc actually drops memory usage significantly if 
you’re using hundreds of the same processes on one box :-)

However, because of PyGC_Collect() called in Py_Finalize(), during interpreter 
shutdown the collection is done anyway, Linux does CoW and the memory usage 
spikes. Which is ironic on process shutdown.

--
Lukasz Langa | Facebook
Production Engineer | The Ministry of Silly Walks
(+1) 650-681-7811

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