Performance of accessing dataSet fields using Field-names instead of indexes

Question

Is the performance negligible?

For example,

myQuery.FieldbyName("MyField").AsString;
myQuery.Fields[0].AsString;

Cases: Table with a decent number of fields, say > 50 fields

Accessing large resultsets, say > 100,000 rows

Is the readability benefit of field names worth the performance decrease?

Answer 1

Here is an interesting post by François Gaillard about FieldByName performance issues.