Need to be able to timeout ruleset execution

[crankycoder]

It is possible to define rulesets which run very slowly on some webpages.

This currently causes performance problems in Firefox (I'm currently testing on 58).

I think we should be able to mitigate this problem if Fathom supported a way to timeout ruleset execution after X ms.

In my head, I'd like something like a callback system where I can pass in a function that accepts the current runtime in ms of the ruleset. Returning a non-zero value should cause the fathom ruleset to abort early.

[danielhertenstein]

@erikrose: How does that changeset (emitting markup) address this issue?

[erikrose]

Apparently, when I imported the FathomFox issues, it fired off the triggers to take action on any mentioned ticket IDs. But the IDs really refer to the FathomFox repo. So I'll have to go through these and say "nuh uh!"

Nuh uh!

[danielhertenstein]

That's unfortunate.

[erikrose]

Happily this seems to have been the only ticket affected.