Debug Test Service

DebugTestService.apxc

public class DebugTestService {
    public class AccountWrapper
    {
        @auraenabled
        public string Name{get;set;}
        @auraenabled
        public integer NumberOfEmployees{get;set;}
        @AuraEnabled
        public List<Contact> Contacts { get; set; }
    }
    public void DebugTest()
    {
        List<AccountWrapper> wrapperList=new List<AccountWrapper>();
        
        AccountWrapper  wrap=null;
        for(integer i=0;i<2000;i++)
        {
            wrap=new AccountWrapper();
            wrap.Name='Test'+ (i+1);
            wrap.NumberOfEmployees=(i+1);
            wrap.Contacts=new List<Contact>();
            for(integer j=1;j<6;j++)
            {
                Contact c=new Contact();
                c.LastName='Contact '+j+' for '+'Test'+ (i+1);
                wrap.Contacts.addAll(new List<Contact>{c});
            }
            wrapperList.add(wrap);
        }
        
        Long startMillis=System.now().getTime();
        Long startCPU=Limits.getCpuTime();
        
        system.debug('wrapperList:'+wrapperList);
        system.debug('wrapperList:'+wrapperList);
        system.debug('wrapperList:'+wrapperList);
        
        Long totalMills=System.now().getTime() - startMillis;
        Long cpuTimes=Limits.getCpuTime() - startCPU;
        
        system.debug('totalMillseconds:'+totalMills);
        system.debug('cpuTimes:'+cpuTimes);
    }
}