Dont try these at home

@theburningmonk theburningmonk.com
dream lvl 1
dream lvl 2
dream lvl 3
dream lvl 4
dream lvl 5

always telling people not
to do something,
and then does it himself!

Dreyfus Model for Skill Acquisition

monkey see,
monkey do

application of
best practices

effectively combine
practices, and deviates
from them as needed

“transcends reliance on rules, guidelines and maxims”
“intuitive grasp of situations based on deep understanding”

“uses an analytical approach in new situations”

“uses an analytical approach in new situations”
how do we get there?

doing the same thing everyday is
going to get you there
NOT

true expertise requires deliberate learning

10,000 hours of deliberate
practice to reach the top of an
ultra-competitive ﬁeld

that’s the 6th walk today
WTF is a pokemon?

pickle Rick!

experimentation

Yan Cui
http://theburningmonk.com
@theburningmonk
AWS user for 10 years

Yan Cui
@theburningmonk
Developer Advocate @

Yan Cui
@theburningmonk
Independent Consultant
advisetraining delivery

homeschool.dev/class/production-ready-serverless
4-week virtual workshop, May 4 - May 29

value of experiments

but, do them tastefully
value of experiments

they will be g00d for you, too!

1. do experiment
2. write a blog post
3. do a talk at user groups or conferences

pubby
do. write. speak.

pubby
do. write. speak.
REPEAT!

here be experiments…

scrapping
snapshotting SPA
E2E testing
visual testing
bots
generating PDFs/PNGs/open graph images, etc.
rendering canvas animations

metaprogramming: programs that can program itself

a Lambda function…
have read-access to its own code

can update its own conﬁguration

can update its own conﬁguration
can update its event source mappings

functions can self-optimize

e.g. adjust memory/timeout dynamically to
deal with back-pressure

functions can deploy updates to itself
updating function conﬁguration causes all warm
lambdas to be killed immediately

e.g. slow-changing, static data in global vars
or environment vars

auto-generated APIs
learning chatbot
self-healing architectures
inlined IAM role-changes
self-building functions
…

https://bit.ly/3fpLjCq

complexity!

hard to test

security? what security!?

im-immutable infrastructure

local lambda
golang SSH server
ngrok

lambdashell.com

avoids Lambda timeouts!
no need for recursive function

relies on implementation details that can
change without notice

local lambda
node debugger
broker
proxy lib

there are easier ways to debug code

there are easier ways to debug code
SAM local, sls invoke local, serverless-ofﬂine,
docker-lambda, etc.

bridge network endpoints
to local MAC address

DO try these
at home

setup time

setup time initialization

setup time initialization
cold start

more memory =
slower cold start!

results could be different now

experiment against realistic workload

https://bit.ly/2XkBgI5

http://bit.ly/2Udjl0U

full AWS-SDK vs.
DynamoDB only

full AWS-SDK vs.
DynamoDB only
webpack!!

http://bit.ly/2Gep1CB

saves ~25ms for every IO op
Set AWS_NODEJS_CONNECTION_REUSE_ENABLED env var to “1”

DON’T
TRY
THESE
AT
HOME WORK

headless Chrome in Lambda: http://bit.ly/2FaA2W4
SSH into a Lambda function: http://bit.ly/2KTnKVE
Trek10’s live Lambda debugger: https://github.com/trek10inc/aws-lambda-debugger
TCP stack over CloudWatch Logs: http://bit.ly/2ZvhbfR
the “Richard Linklayer” project: https://github.com/smithclay/rlinklayer
Tom Wallace “metaprogramming in Lambda”: http://bit.ly/2WMY9VB
Lambda internals: http://bit.ly/2WMqYRT
running Docker in Lambda: http://bit.ly/2IQ7lhY
the “scar” project for running Docker in Lambda: https://github.com/grycap/scar
investigation into Lambda coldstart time: http://bit.ly/2WL1uj0
how expensive is the AWS SDK: http://bit.ly/2Udjl0U
optimized AWS SDK layer: https://github.com/lumigo/lambda-layer-optimized-aws-sdk

https://theburningmonk.com/hire-me
AdviseTraining Delivery
“Fundamentally, Yan has improved our team by increasing our
ability to derive value from AWS and Lambda in particular.”
Nick Blair
Tech Lead

Production-Ready Serverless

homeschool.dev/class/production-ready-serverless
4-week virtual workshop, May 4 - May 29
burningblogmay202015% off with code

lambdabestpractice.com bit.ly/complete-guide-to-aws-step-functions
20% off my courses
slsdays-paris-may2020

@theburningmonk
theburningmonk.com
github.com/theburningmonk

Dont try these at home

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