bottleneck
Bottleneck (bottleneck) is a concept of constraint in system design. English meaning "neck of a bottle."... rate-determining (risuku)... bottleneck (airo), a synonym also exists... An allusion to the fact that no matter how large the size of the bottle, the volume and rate of outflow (throughput) of the contents is constrained only by the narrowed neck.
https://gyazo.com/483d58d852629d7cff9128fc61f61bd6
https://ja.m.wikipedia.org/wiki/ボトルネック
Local optimization of non-bottleneck areas does not improve overall throughput (local optimum is not global optimization).
→ First, identify the bottleneck.
relevance
Don't guess, measure.
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