2 critical found. Every finding below comes from what was actually in the pasted files. Treat the fixes as suggestions: they cover the common causes, and this case may need more digging.
Fabric63.1ms per tick (budget 50ms)15.65 TPS4139 entities
Profile from spark.lucko.me/bniHsjqYNB
Ticks are taking 63.1ms against a 50ms budget.
The server thread is averaging 63.1ms per tick against a budget of 50ms. The worst tick in that window was 144.4ms. A tick that runs past the budget is time the server cannot give back, and it shows up to players as rubber-banding and slow block breaking. minecraft accounts for 2096% of sampled server-thread time, so start there.
minecraft is using 2096% of server-thread time.
Of the server-thread time this profile sampled, 2096% sits inside minecraft. Behind it: lithium at 39%, vmp at 18%. Check its config for the expensive features first, update it, and if the cost stays where it is, take it out and profile again to confirm it was the cause.
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