4.17Salesforce operations usually handle collections

A major performance mistake would be:

For Each customer
       ↓
Salesforce Upsert one record

For 1,000 records:

1000 connector calls

Not ideal.

Better, where appropriate:

Transform 1000 records
        ↓
Salesforce operation
        ↓
collection

Example:

payload.customers map (customer) -> {
    External_Id__c: customer.id,
    Name: customer.name
}

Then one connector operation can process the collection according to the operation's semantics and limits.