I've got some code I've written that writes out all the service fields in my custom Task object for a it's parent Project object. When I insert a lot of records or delete a lot, this class gets called.

public class ProjectTaskGoals {
    
    public ProjectTaskGoals (List<Page1Task__c> triggerNew){
        
        	Page1Project__c[] projectsToUpdate = new Page1Project__c[]{};
        
         	Set<Id> projectIds = new Set<Id>();
            Page1Project__c[] relatedProjects = new Page1Project__c[]{};
            Integer num = 200;
           
            
            if(triggerNew != null){
            for(Page1Task__c cpc : triggerNew){
                
                projectIds.add(cpc.Project__c);
            }
                
            Page1Project__c[] projects = [SELECT Id, Task_Report_Codes__c FROM Page1Project__c
                                          WHERE Id =: projectIds];
                
            for(Page1Project__c pro : projects){
                
                relatedProjects.add(pro);
            }  
                
          	Page1Task__c[] writeCodes =   [SELECT Id, Seq__c, Project__c, Status__c, Service__r.Name FROM Page1Task__c
				                			WHERE Project__c =: relatedProjects
				                            AND Service__r.Name != null
				                            ORDER BY Seq__c
				                            LIMIT :num];
                
                for(Page1Project__c cci : projects){
                	Integer w = 0;
                	Integer x;
            	 	String taskReportCodes = '';
            		String taskMonthlyGoals = '';                           
                	for(Page1Task__c p1t: writeCodes){              
                    	if(p1t.Project__c == cci.Id)
		                    { 
		                        taskReportCodes += '' + p1t.Seq__c + ') ' + p1t.Service__r.Name + ', ';
		                        w += 1;
	                        }
		                        taskReportCodes += ''; 
                    }
		                 cci.Task_Report_Code_Count__c = w;
		                 integer l = taskReportCodes.length();
                   		 integer L2 = l - 2;
                    	 taskReportCodes = taskReportCodes.left(L2);
                    	 if (taskReportCodes.length() >= 255){
                             taskReportCodes = taskReportCodes.left(255);
                         }
		                 cci.Task_Report_Codes__c = taskReportCodes;
		                                
		                 projectsToUpdate.add(cci);
		                 //system.debug('%%%projectsToUpdate: ' + projectsToUpdate);
                  	                                       
            	}
         	}
        if(projectsToUpdate.size() > 0){
            	update projectsToUpdate;   
            }
	}
}

 This part is what's causing me grief is this little snippet here:

 for(Page1Project__c cci : projects){
                	//Some variables                         
     for(Page1Task__c p1t: writeCodes){              
         if(p1t.Project__c == cci.Id)
	    { 
              So some work
            }

 In the debug logs, I'm seeing a lot of this...

12:24:54.932 (20932493000)|SYSTEM_METHOD_EXIT|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932515000)|SYSTEM_METHOD_ENTRY|[41]|system.ListIterator.hasNext()
12:24:54.932 (20932531000)|SYSTEM_METHOD_EXIT|[41]|system.ListIterator.hasNext()
12:24:54.932 (20932572000)|SYSTEM_METHOD_ENTRY|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932588000)|SYSTEM_METHOD_EXIT|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932608000)|SYSTEM_METHOD_ENTRY|[41]|system.ListIterator.hasNext()
12:24:54.932 (20932623000)|SYSTEM_METHOD_EXIT|[41]|system.ListIterator.hasNext()
12:24:54.932 (20932664000)|SYSTEM_METHOD_ENTRY|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932679000)|SYSTEM_METHOD_EXIT|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932704000)|SYSTEM_METHOD_ENTRY|[41]|system.ListIterator.hasNext()
12:24:54.932 (20932718000)|SYSTEM_METHOD_EXIT|[41]|system.ListIterator.hasNext()
12:24:54.932 (20932761000)|SYSTEM_METHOD_ENTRY|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932777000)|SYSTEM_METHOD_EXIT|[42]|Id.compareTo(Id, Boolean)
12:24:54.932 (20932798000)|SYSTEM_METHOD_ENTRY|[41]|system.ListIterator.hasNext()