Abstract: The subject disclosure is directed towards a technology in which a first software version (e.g., build or check-in) that corresponds to a failure/regression is automatically identified. Software versions associated with a development order are automatically loaded and tested according to a search plan that narrows in on which version a failure condition first appears. For example, a binary search may be used that looks back to a previous version when a failure is detected on a tested version, or moves to a subsequent version when the failure is not detected. The search plan allows multiple test machines run tests in parallel on different versions, and adapts to the number of test machines available for testing.

Abstract: A system for classifying links may be used for filtering email messages and other content. Links may be classified by many methods, including analyzing registration databases and cached or actual resources referenced by the links. Using registration data, a link may be classified based on the registrar, registrant, and the date of registration. The resource referenced by the link may be analyzed using keywords as well as incoming and outgoing links to the reference. Once classified, the link may be used to classify email messages and web content for unwanted advertisement, pornography, malicious software, phishing, or other classifications.