fix cpu usage on linux#7

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crop2000 wants to merge 5 commits intohaubie:mainfrom

Commits on Jul 30, 2024

fix cpu usage on linux\nslow down loop in subscription thread
crop2000
committed

Commits on Aug 1, 2024

let close and unsubscribe functions wait
crop2000
committed

Commits on Aug 11, 2024

simplify threads
crop2000
committed

Commits on May 13, 2025