apex-forloopspeeds

Demonstrates the most time efficient for loops in Apex

Set up data

// Create account
Account account = new Account(Name = 'ForLoopSpeedTest');
insert account;

// Add 5k contacts to the account
List<Contact> contacts = new List<Contact>();
for (Integer i = 0; i < 5000; i++){
    contacts.add(new Contact(LastName = 'Test'));
}
insert contacts;

Test Loops

// Get current start time
Integer startTime = Limits.getCPUTime();

// Execute first loop test
ForLoopSpeedTest.setFieldValue1(accounts[0], 'Test'); // Test loop 1. Change to different method to test different loops

// Get execution end time
Integer endTime = Limits.getCPUTime();

// Return time taken to run the fo loop
System.debug('\n\nTime spent was: ' + (endTime - startTime) + '\n\n');