Slow down when adding multiple torrents

[uhthomas]

What version of WebTorrent?
master (0.98.8) and below

What operating system and Node.js version?
Windows 10 & Mac OSX Sierra

What browser and version? (if using WebTorrent in the browser)
Tried with the latest build of Chrome. Canary and Firefox

What did you expect to happen?
Not slow down and crash webpages.

What actually happened?
Pages slow down significantly when adding multiple torrents at a time. Even with a 100ms delay between adding torrents the page becomes unusable. Adding 50~ torrents with a 100ms between addition, this is the CPU profile

This behavior can be seen when going to instant.io and adding maybe 10~ torrents.

[feross]

Thanks for posting this issue. I plan to do something about the CPU issue when I get some more time. This is a known issue.

Also, btw, it's probably not a good idea to add 50 torrents to the client (if they are all downloading) at the same time, even once we fix this issue. Most torrent clients limit to 5 active at any given time.

[lock]

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