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MDL-50798 question: Raise time limit when rendering questions
Rendering a large number of questions may be quite slow, so we want to raise the limit. We don’t call raise() in the loop because the quiz buffer captures this function for a AJAX script, and we should only call raise if we expect a corresponding output to the users browser. This helps to prevent unexpected load balancer disconnects. See core_php_time_limit::raise() for more details.
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