1. A system configured to utilize semantic analysis to set a processing level for processing measurements of affective response, comprising: a semantic analyzer configured to: receive a first segment of content, analyze the first segment utilizing semantic analysis, and output a first indication that a first value related to a predicted emotional response to the first segment does not reach a first predetermined threshold; wherein the first segment comprises data representing text; and a hardware-based controller configured to select, based on the first indication, a first processing level for a processor to process measurements of affective response of a user to the first segment; wherein the semantic analyzer is further configured to: receive a second segment of content, analyze the second segment utilizing semantic analysis, and output a second indication that a second value related to a predicted emotional response to the second segment reaches a second predetermined threshold; wherein the second segment comprises data representing text; wherein the hardware-based controller is further configured to select, based on the second indication, a second processing level for a processor to process measurements of affective response of the user to the second segment; wherein, per volume unit of measurement data, the number of computation cycles utilized by the processor to process, at the first processing level, the measurements of the affective response of the user to the first segment, is at least 50% lower than the number of computation cycles utilized by the processor to process, at the second processing level, the measurements of the affective response of the user to the second segment.