dotnetcore3.1 vs node.js14.x

This is my second series of comparisons. The first was a more cold start test, while on this one, I want to check how they compare in a warm status.

What I did

Two Lambda functions:

• Dotnetcore3.1
• Nodejs14.x

They get the SQS event as input and save it into DynamoDB.

TESTS

The first noticeable thing is the package size:

• Process 200K SQS messages
• Process 400K SQS messages

METRICS TEST 200K SQS

Nodejs14.x:

Dotnetcore3.1:

Insight:

METRICS TEST 400K SQS

Nodejs14.x:

Dotnetcore3.1:

Insight:

Conclusion

Dotnetcore3.1 is the winner, and even if it could have a slower start, it is much faster in a warm serverless scenario.

Faster means a cheap bill, and with 1ms pricing, there is now more of an incentive to optimize the duration of functions.