pycp is slow

[dmerejkowsky]

version 8 is slower than 7, which is slower than cp, and not by a small margin.

Ideas:

• Optimize usage of python-cli-ui
• Use 2 processes, one for the disk I/O, and an other one for the output
• Throttle console output
• Use async stuff ?
• Rewrite in an other language. Rust ? Javascript ?

But first we need to do some serious benchmarking ...

[dmerejkowsky]

22 contains the first two ideas.

I'm more or less convinced using async stuff wo't help.

Let's keep the 'rewrite in rust' idea for later

[dmerejkowsky]

Implementing output throttle now makes pycp 8 faster than pycp 7

Let's say we're done now :)

[dmerejkowsky]

I'm wondering if throttling the output is enough, but it was fun playing with multiple processes