Optimization of CPU time of FastCaloSimV2 (ATLASSIM-3980) (!20467) · Merge requests · atlas / athena

Xiaozhong Huang requested to merge xiaozhon/athena:fcs-profiling into 21.0 Jan 20, 2019

The CaloCellContainer is set to be incomplete by default. Thus, a look up table is needed to to find the correct index based on the hash value of the cell element. In fact, the CaloCellContainer is always ordered and complete after creation the look up table is not needed.

After modification, the CPU time/evt is reduced from 71ms to 53ms for single photons.

Edited Feb 26, 2019 by Xiaozhong Huang

Optimization of CPU time of FastCaloSimV2 (ATLASSIM-3980)

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