Looking to improve my server [Spark report]

So I'm looking to improve my server in terms of tps/ping. But I have no idea how to read through spark report and how to analyze what is taking my resources, so if you are willing to help me out I would appreciate it.
Spark link:https://spark.lucko.me/SuyiZTIkoO
spark is a performance profiler for Minecraft clients, servers, and proxies.
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