AX Performance: Insert vs RecordInsertList

Today I would like to show you the difference, performance wise, between a plain insert of a big set of data versus an insert via a “RecordInsertList” in AX. My example is based on Dynamics 365 fFO (AX7), but it would work the same way in AX 2012.

Setup the Insert vs RecordInsertList Test

First I created a new table for this test. I just added an integer and a string field, both fields also define an index for this table.

AX7 AX2012 Insert vs RecordInsertList Table

Next, I created a runable class to perform both insert operations against the database.

First the “normal” insert statement:

Per given row we would insert an id and a string value, nothing special here.

Next the “RecordInsertList“:

In contrast to the “normal” insert statement I defined a new “RecordInsertList” object and provided the table id of the “BulkInsertTable”. Instead of an insert in the for – loop, I just call the add method of the list and provide the table buffer in every iteration.

After the loop is finished, I call the insertDatabase method to get my records inserted to the database.

I added the complete code to the end of this post.


In my test I performed both operations with 10k, 100k and 1mio rows:

AX7 AX2012 Insert vs RecordInsertList Results

As  you can see the “RecordInsertList” is significantly faster and should be used for inserting bulk data instead of the insert method. (Clearly overlooked that “timeConsumed” already adds units 😉 )

Full Code


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