digitalocean / digitalocean/pgremapper

pgremapper performance limit?

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Description

Hi, I find the cluster, where `cancel-backfill` is not super fast as usual (took minutes)
1423 osds | 37920 pgs - not super big. But have 38 rack buckets with 67 hosts

What I see is that `pgremapper` use only ~ 3 cores of 24 cores CPU, and that's suspicious (low) for golang. May be this some limit in code or on compiler? Or scalability milestone for an application?

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