CMS High-Level Trigger Selection

The CMS High-Level Trigger (HLT) is based on sets of dedicated commercial processors, whose goal is to reduce the Level-1 trigger rate of 100~kHz to about 100~Hz, a value compatible with permanent storage of data. In this report, the results from the recently published DAQ TDR are presented. The offline code can be used with little modifications in the trigger chain soon after Level 1, by making use of regional and conditional analyses. For the benchmark channels considered, the signal efficiencies and background rejection factors, obtained within about 500~ms of a recent CPU (1 GHz processor), are competitive with full offline analyses done without any timing limitation.