[checkmk-commits] [tribe29/checkmk] a281cc: Removed a performance pessimization regarding auth...

Branch: refs/heads/2.0.0 Home: https://github.com/tribe29/checkmk Commit: a281cc764d12dc7a1020adbd776e22d22ade4af8 https://github.com/tribe29/checkmk/commit/a281cc764d12dc7a1020adbd776e22d22… Author: Sven Panne <sven.panne(a)tribe29.com> Date: 2022-03-21 (Mon, 21 Mar 2022) Changed paths: M livestatus/src/TableHostsByGroup.cc M livestatus/src/TableServicesByGroup.cc Log Message: ----------- Removed a performance pessimization regarding authorization. There were a few broken attempts in the code to "improve" authorization performance, which actually made things *much* worse in the extreme case: To avoid a check which only costs O(1) per host, an authorization check was left out under some circumstances. The equivalent check was implictly done later when the hosts were processed, but only *after* any filters have been evaluated. If the filters do some non-trivial work, this is a bad tradeoff. In general: Try to filter out things as soon as possible, this will give the best complexity, and avoid premature "optimizations", which might turn out to make things worse. Change-Id: I872d5cfd14e3811add1997c720bade7d4aa3ea05