Abstract: Computerized techniques are described for detecting performance degradation during features ramp up. A first version of web content is sent to first client devices. The first version of the web content lacks a particular feature. First performance data that indicates performance of each first client device with respect to processing the web content is received. A second version of the web content is sent to second client devices. The second version of the web content has the particular feature. Second performance data that indicates performance of each second client device with respect to processing the web content is received. The first performance data is compared with the second performance data to determine a difference between a processing metric associated with the first version of the web content and a processing metric associated with the second version of the web content.

Abstract: Various embodiments include a method and system for high-volume distributed script error report handling. An error report group threshold may be obtained. The error report group threshold may be determined by available computing resources, at an error facility, to receive error reports. A subset of current user terminals with representative user terminal environments may be identified. The subset may have a cardinality less than the error report group threshold. Members of the subset may be notified to report errors for a distributed program.

Abstract: Various embodiments include a method and system for high-volume distributed script error report handling. A group of user terminals may be selected to report errors, where the group of user terminals is a subset of user terminals having open user session and the group of user terminals is smaller than a predetermined threshold value. An error report, generated by a user terminal in response to a script error, may then be received, where the user terminal is in the group of user terminals selected to report errors. The received error report may then be processed to create a processed error report. The processed error report may then be presented to a service user.

Abstract: Various embodiments include a method and system for high-volume distributed script error report handling. A group of user terminals may be selected to report errors, where the group of user terminals is a subset of user terminals having open user session and the group of user terminals is smaller than a predetermined threshold value. An error report, generated by a user terminal in response to a script error, may then be received, where the user terminal is in the group of user terminals selected to report errors. The received error report may then be processed to create a processed error report. The processed error report may then be presented to a service user.