Use uvloop where available

[ichorid]

Moving to Asyncio enables us to use faster, uvloop reactor on those systems (Linux, Mac?) where available. Tests with Tribler exit nodes show that uvloop reduces CPU usage by 30% while also improving memory usage. This is especially important for low-tier platforms, such as ARM.

Enabling it is a matter of literally two lines of code:

import uvloop
asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())

for systems with older uvloop version (e.g. Debian) or

import uvloop
uvloop.install()

for everything else.

[synctext]

interesting. We need this indeed to build our community of users. Given the facinating findings of our bug reporter. Let's edit the next 7.6 milestone. "Amazing stability" as the first keywords of that release. No big changes for now, perfect tuning like this.

[devos50]

I would recommend to look into this once our application tester is stable again. Then we can more easily test for unexpected behaviour/edge cases.

[qstokkink]

We will not include uvloop. Our network activity that requires high throughput has now been implemented in Rust.