perf: run GC a little less aggressively
perf: run GC a little less aggressively

The delay will not be adjusted on a per-GC basis, depending on its last
run-time. This should average to around 2-3s, which should be a good
compromise between GCing too often and too infrequently.

hlissner/doom-emacs,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d