App very slow start up

this is very frustrating. My app takes about ~40 sec to load. i don’t know if it is a problem of build or release !!!
i have tried a lot of commands but none of them works for me
ionic cordova build android --prod --aot --minifyjs --minifycss --optimizejs
ionic cordova run android --prod
here’s a screen shot to

ionic info

Any help will be appreciated !

hello !!! any suggestion ??