Add some basic benchmarking of the tracker

[mickvandijke]

Added script to benchmark the tracker's http(s) announce performance and memory usage.
The lua script auto generates a new info hash for every request and is executed using the benchmarking tool called "wrk": https://github.com/wg/wrk

I have included a readme in the tests folder on how to run the benchmark.

README.md

Running Benchmarks

HTTP(S) Announce Peer + Torrent

For this benchmark we use the tool wrk.

To run the benchmark using wrk, execute the following example script (change the url to your own tracker url):

wrk -c200 -t1 -d10s -s ./wrk_benchmark_announce.lua --latency http://tracker.dutchbits.nl

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[josecelano]

Cool! Maybe we can add a scheduled workflow and run it every week. Maybe you could write the current results in the README.

[da2ce7]

Or a BENCHMARKS_HISTORY.md file.