use O2 as maximal compiler optimization level
use O2 as maximal compiler optimization level

nmandery/batyr,geops/batyr,nmandery/batyr,nmandery/batyr,geops/batyr,geops/batyr,geops/batyr,geops/batyr,geops/batyr,nmandery/batyr,nmandery/batyr,nmandery/batyr