CustomScriptExecution is taking around 2 minutes for a simple script to create directory/file

CustomScriptExecution is taking +/- 2 minutes for a simple script to create a directory/file for the first time(newly created vm). WaAppAgent logs shows the time around 1 minute, extension logs shows the execution time less than 30 seconds. So where the another minute spend ? Is there any way to increase the priority of the script execution or execute synchronously ?