Developers arriving at the Serverless scene usually find it hard to use the previous methodologies and tools they are used to in this new arena. Why? Because you can’t run Serverless locally. Up until now, a developer could spin a container or install PostgreSQL or NGNIX on their machine and start playing. The cycle of code → build → test was reasonably fast, but now it changed, building and testing cannot run locally, they have to run in the cloud which causes developers to lose productivity. How do we change it? How do we keep the same productivity levels while enjoying the benefits of Serverless. The following session will cover: Reasons for a slow development cycle in Serverless environments Tips and tricks for speeding up the development flow

1. 8 ways to speed up
your Serverless
development
efi@lumigo.io | @TServerless

2. Who am I
2
Part of my expertise is building the dev pipeline in Lumigo.
Working a lot with companies on the subject.
Don’t hesitate to ask me questions

3. Who are we
3
A serverless
intelligence
platform to
visualize, monitor
and troubleshoot
applications

4. Serverless is a powerful paradigm
4
Elasticity
Cost
Service Provider

5. 5
But it changes the way we develop
Code
Test
Build
Plan
We started slow, we eat
serverless for breakfast,
our dev is very fast.

6. Agenda
• Why is development is slow
• Running locally
• Speeding up tips and tricks
6

7. Development cycle is slow
7
Because the best way to
test it is to use an actual
cloud environment

8. Why local is not good enough
8

9. But you can definitely start with it
9
Start simple,
as you
progress
complicate
your flow.

10. Start simple - Unit tests
10
• Why not just call your
Lambda handler
through unit tests

11. Ok I’ll spin a container
11
• Have you ever heard about
Serverless Offline
• Using docker-lambda
I want
to be
there!

12. Ok, so it’s time for the big guns
12
• Localstack
• Definitely a power tool
• I find it complicated

13. When local is not enough
13
It’s time test on a real cloud environment

14. Speeding up
14
• You have a single bottleneck…
• Upload

15. Speeding up
15
Resource creation is
heaviest part, run them
at the beginning of the
development and in
parallel
1

16. Speeding up
16
• Trim your
package
• Choose the right
language
• Use layers
2
https://github.com/mthenw/
awesome-layers

17. Speeding up
17
Have fast upload
3

18. 4
Speeding up
18
• Debug in the cloud
• Use debugging tools
Great for debug, but do not update
Your Lambda in prod like that

19. Speeding up
19
Deploy only your changes
serverless deploy function -f functionName
5

20. Speeding up
20
S3 Transfer Acceleration
(use CloudFront)
serverless deploy --aws-s3-accelerate
6

21. Speeding up
21
• Each developer has
its own cloud
environment
• Fully automated
https://hackernoon.com/development-
flow-in-serverless-environment-from-the-
trenches-d42021b7aef0
7

22. Speeding up
22
Use unit testing when
possible8

23. Conclusion
• Always test in the cloud
• But, start with local
• 8 great and simple tips to
speed up
23

24. Shape the future of serverless with
us
24

25. THANK
YOU
lumigo.io | @TServerless