This is a nice idea: explicitly reserving issues for first time contributors, to ensure there are ways new people can get started easily!
miniblog.
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Interesting post on GC implementation:
https://olshansky.me//gc/runtime/dlang/2017/06/14/inside-d-gc.html
(I learnt jemalloc doesn't only offer reserving powers of 2 — avoids wastage)