class JobData

The function responsible for carrying out the job.

The total time spent on this job.

In multi-threaded mode, this includes the overhead for sending messages, plus any time spent waiting for a canceled job to return. The latter delay can be reduced by returning at regular intervals.

JobData instances will regularly be copied in HTML5, so checking equality won't work. Instead, compare identifiers.

The original State object passed to the job. Avoid modifying this object if the job is running in multi-threaded mode.