BPF JIT?

[LateralShift]

Every time I start an application with wine (6.0 Staging, Debian 10.7) I get this message:

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002c:err:seh:check_bpf_jit_enable BPF JIT is not enabled in the kernel, enable it to reduce syscall emulation overhead.

I have tried searching around and can't find any info on BPF JIT, so I have several questions:
What is it?
How do I enable it on Debian?
Will it make my kernel less secure?
Is there likely to be significant performance gain?

[jkfloris]

How do I enable it on Debian?

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echo 1 | sudo tee /proc/sys/net/core/bpf_jit_enable

This is enabled in Debian Testing/Sid by default