Syscall tracing very very very slow about pete HOT 3 OPEN

First i don't know this project, i was looking at it and i seen your issue!

In src/ptracer.rs at 363 is:

const DEFAULT_POLL_DELAY: Duration = Duration::from_millis(100);

You can add this line after 36 in examples/syscalls.rs

*ptracer.poll_delay_mut() = std::time::Duration::ZERO;

The delay i think was added to be more readable!

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Interesting. Surely there's a way to do this without polling?

Also btw @ranweiler you can slightly simplify the loop that does the poll because in Rust loops can return values.

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@Timmmm, thanks for reporting, the default poll delay is definitely too high. I'll try to at least push a perf bugfix for that tonight, but as noted above, you can set it yourself in the meantime.

I'm experimenting with a few different strategies that would let the kernel notify us, instead of manual polling. There are some tradeoffs, assumptions about tracee behavior, and version-dependent Linux-isms at play here, so I'm trying to be very careful in how I implement it. I'll probably preserve the polling as a fallback mode, but that's part of what I'm trying to sort out. Please stand by!

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