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AmWe Apex For Loop
Hi All,
Type 1 : for(Account ac : [SELECT Id FROM Account LIMIT 100])
Type 2 :List<Account> acs = [SELECT Id FROM Account LIMIT 100];
for(Account ac : acs)
Type 3 :List<Account> acs = [SELECT Id FROM Account LIMIT 100];
for(Integer i=0,j=acs.size();i<j;i++)
From above 3 looping methods we identified that type 3 is bit more faster than type 2 and Type 1 is very much slower compared to 2 and 3.
But type 1 consumes very little heap size compared to 2 and 3.
What is the reccomended method to use? Salesforce recormends to use type 1 since it consumes less heap. if we didn't use that, will it be considered in salesforce code reviews
Type 1 : for(Account ac : [SELECT Id FROM Account LIMIT 100])
Type 2 :List<Account> acs = [SELECT Id FROM Account LIMIT 100];
for(Account ac : acs)
Type 3 :List<Account> acs = [SELECT Id FROM Account LIMIT 100];
for(Integer i=0,j=acs.size();i<j;i++)
From above 3 looping methods we identified that type 3 is bit more faster than type 2 and Type 1 is very much slower compared to 2 and 3.
But type 1 consumes very little heap size compared to 2 and 3.
What is the reccomended method to use? Salesforce recormends to use type 1 since it consumes less heap. if we didn't use that, will it be considered in salesforce code reviews
When you use Type1 salesforce processes the records returned in the list in chunks (more or less like a batch ) hence it is considered as a recommended one.