Run3 CMS High Level Trigger Performance

The CMS experiment at CERN uses a two-stage trigger system to filter and store events of physics importance a hardware-based Level 1 (L1) trigger that uses fast electronics to process data in a pipeline fashion at 40 MHz with an output rate of 100 kHz and a software-based High-Level Trigger (HLT) run on computer farms with an output rate of around 1.5 kHz. Many novel trigger algorithms, coupled with technological developments such as heterogeneous computing in GPUs were developed to cope with the increased luminosity and physics needs of Run 3. This poster summarises the performance of HLT for Run 3.