Mongoid 8 slow insertions?

[Jamis_Buck]

Mongoid 8.0.8 and 8.1.5 are available now, addressing this performance regression.

Mongoid 8.0.8, 8.1.5

Mongoid 8.0.8 and 8.1.5 are the latest patch releases in the 8.0 and 8.1 series. They include the following two fixes: MONGOID-5704: By default, associations (like belongs_to) are validated when a document is saved. However, Mongoid was aggressively loading persisted associations and validating them, which led to a significant performance regression in Mongoid 8+ (versus Mongoid 7.x). This patch fixes this regression by only validating associations that are (1) currently in-memory, and (2) eith…