AWS lambda performance: JavaScript vs Python vs Golang
Which language to use for AWS lambda?
Page content
We can write lambda function for deployment to AWS in several languages. Let’s compare the performance of (almost empty) functions written in JavaScript, Python and Golang…
TL;DR
Putting it short:
| Language | Billed Duration Warm-up | Billed Duration | Memory Size | Max Memory Used |
|---|---|---|---|---|
| Python | 197 ms | 2 ms | 128 MB | 32 MB |
| Python S3 | 516 ms | 35 ms | 128 MB | 77 MB |
| JavaScript | 2 ms | 2 ms | 128 MB | 63 MB |
| JavaScript S3 | 120 ms | 72 ms | 128 MB | 89 MB |
| Golang | 11 ms | 1 ms | 128 MB | 20 MB |
| Golang S3 | 30 ms | 29 ms | 128 MB | 38 MB |
- Python have longest warm-up time on 128GB RAM,
- JavaScript is the slowest overall
- Golang is best of them three but not significantly
Interesting option is to speedup the python lambda function by adding more memory, and at the same time CPU. It will only decrease warmup time, I guess. Calling to S3 will not become less latent.
In the synthetic prime numbers test by AWS - the cost of running Python lambda is the same then using 128MB and 512MB RAM limit,
and performance of 512MB setup is significantly faster.
https://docs.aws.amazon.com/lambda/latest/operatorguide/computing-power.html
What is the AWS SAM
We are using SAM to test different lambda fuctions here.
AWS SAM is a Serverless Application Model.
The AWS SAM project includes the AWS SAM template and the function code. SAM template describes how do deploy run and test the lambda function, permissions and other important parameters for creating the CloudFormation stack.
To use is we need aws cli and sam cli.
Install AWS cli
Local how-to: Install AWS CLI in Reinstall linux doc
Or on aws site: https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html
Install SAM cli
Basically - Get SAM cli intaller zip from AWS site, unzip and install
wget https://github.com/aws/aws-sam-cli/releases/latest/download/aws-sam-cli-linux-x86_64.zip
unzip aws-sam-cli-linux-x86_64.zip -d sam-installation
sudo ./sam-installation/install
# check the sam is installed
sam --version
Cleanup the installer files
rm -rf sam-installation
rm aws-sam-cli-linux-x86_64.zip
Creating the lambda functions
Calling three times the script
sam init
and selecting every time hello-world template, but different languages, we create 3 sam applications
AWS Lambda function based on Python 3.12
the output of sam init:
-----------------------
Generating application:
-----------------------
Name: t1-py
Runtime: python3.12
Architectures: x86_64
Dependency Manager: pip
Application Template: hello-world
Output Directory: .
Configuration file: t1-py/samconfig.toml
Next steps can be found in the README file at t1-py/README.md
Commands you can use next
=========================
[*] Create pipeline: cd t1-py && sam pipeline init --bootstrap
[*] Validate SAM template: cd t1-py && sam validate
[*] Test Function in the Cloud: cd t1-py && sam sync --stack-name {stack-name} --watch
AWS Lambda function based on JavaScript and nodejs20.x
the output of sam init:
-----------------------
Generating application:
-----------------------
Name: t2-js
Runtime: nodejs20.x
Architectures: x86_64
Dependency Manager: npm
Application Template: hello-world
Output Directory: .
Configuration file: t2-js/samconfig.toml
Next steps can be found in the README file at t2-js/README.md
...
AWS Lambda function based on Golang (aws image al2023)
the output of sam init:
-----------------------
Generating application:
-----------------------
Name: t3-go
Runtime: go (provided.al2023)
Architectures: x86_64
Dependency Manager: mod
Application Template: hello-world
Output Directory: .
Configuration file: t3-go/samconfig.toml
Next steps can be found in the README file at t3-go/README.md
Build, Test, Deploy and Execute - Python based Lambda function
test locally
sam build --use-container
the output shows in the end:
Commands you can use next
=========================
[*] Validate SAM template: sam validate
[*] Invoke Function: sam local invoke
[*] Test Function in the Cloud: sam sync --stack-name {{stack-name}} --watch
[*] Deploy: sam deploy --guided
after running three times
sam local invoke
the output we see:
REPORT RequestId: 3b36575a-629d-40ba-adb7-018bdb8cae63 Init Duration: 0.09 ms Duration: 46.95 ms Billed Duration: 47 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: e1233b8a-99c6-49d9-ab91-f02408a5ec6f Init Duration: 0.07 ms Duration: 44.56 ms Billed Duration: 45 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: 34772494-39ff-457d-a1c1-16cd5e177b42 Init Duration: 0.02 ms Duration: 26.35 ms Billed Duration: 27 ms Memory Size: 128 MB Max Memory Used: 128 MB
if we add s3 read call, the output will be different
...
REPORT RequestId: 158b806c-852d-4f6b-ab28-cdd6e0868fa1 Init Duration: 0.02 ms Duration: 675.64 ms Billed Duration: 676 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: d4cc689c-f944-49fa-9254-555266816b97 Init Duration: 0.79 ms Duration: 465.80 ms Billed Duration: 466 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: b8d30096-cd93-4787-84d7-e8f52d7e2e13 Init Duration: 0.02 ms Duration: 447.83 ms Billed Duration: 448 ms Memory Size: 128 MB Max Memory Used: 128 MB
Ok each call takes 1/2 sec, and RAM used is 128 MB
test on aws
sam build --use-container
sam deploy --guided
SAM cli will ask about CloudFormation stack name, then for confirmation, then deploys our function to AWS. The last page of sam output would look something like
Previewing CloudFormation changeset before deployment
======================================================
Deploy this changeset? [y/N]: Y
2024-08-17 20:19:30 - Waiting for stack create/update to complete
CloudFormation events from stack operations (refresh every 5.0 seconds)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ResourceStatus ResourceType LogicalResourceId ResourceStatusReason
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
CREATE_IN_PROGRESS AWS::CloudFormation::Stack t1-py User Initiated
CREATE_IN_PROGRESS AWS::IAM::Role HelloWorldFunctionRole -
CREATE_IN_PROGRESS AWS::IAM::Role HelloWorldFunctionRole Resource creation Initiated
CREATE_COMPLETE AWS::IAM::Role HelloWorldFunctionRole -
CREATE_IN_PROGRESS AWS::Lambda::Function HelloWorldFunction -
CREATE_IN_PROGRESS AWS::Lambda::Function HelloWorldFunction Resource creation Initiated
CREATE_COMPLETE AWS::Lambda::Function HelloWorldFunction -
CREATE_IN_PROGRESS AWS::ApiGateway::RestApi ServerlessRestApi -
CREATE_IN_PROGRESS AWS::ApiGateway::RestApi ServerlessRestApi Resource creation Initiated
CREATE_COMPLETE AWS::ApiGateway::RestApi ServerlessRestApi -
CREATE_IN_PROGRESS AWS::Lambda::Permission HelloWorldFunctionHelloWorldPermissionProd -
CREATE_IN_PROGRESS AWS::ApiGateway::Deployment ServerlessRestApiDeployment47fc2d5f9d -
CREATE_IN_PROGRESS AWS::Lambda::Permission HelloWorldFunctionHelloWorldPermissionProd Resource creation Initiated
CREATE_COMPLETE AWS::Lambda::Permission HelloWorldFunctionHelloWorldPermissionProd -
CREATE_IN_PROGRESS AWS::ApiGateway::Deployment ServerlessRestApiDeployment47fc2d5f9d Resource creation Initiated
CREATE_COMPLETE AWS::ApiGateway::Deployment ServerlessRestApiDeployment47fc2d5f9d -
CREATE_IN_PROGRESS AWS::ApiGateway::Stage ServerlessRestApiProdStage -
CREATE_IN_PROGRESS AWS::ApiGateway::Stage ServerlessRestApiProdStage Resource creation Initiated
CREATE_COMPLETE AWS::ApiGateway::Stage ServerlessRestApiProdStage -
CREATE_COMPLETE AWS::CloudFormation::Stack t1-py -
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
CloudFormation outputs from deployed stack
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Outputs
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
...
Key HelloWorldApi
Description API Gateway endpoint URL for Prod stage for Hello World function
Value https://wq3w4d41j7.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
...-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
See there HelloWorldApi key with the desctipion API Gateway endpoint URL for Prod stage for Hello World function? There is our public url:
https://wq3w4d41j7.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
but let’s start our log listener first:
sam logs -n HelloWorldFunction --stack-name "t1-py" --tail
and then while the log listener is trunning, call in another terminal window:
curl https://wq3w4d41j7.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
curl https://wq3w4d41j7.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
curl https://wq3w4d41j7.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
output:
2024/08/18/[$LATEST]d86ecb94a39d44778f35bc2200b077a7 2024-08-18T00:46:22.468000 REPORT RequestId: 2e35fcf9-4d4b-4ced-962e-923adeddcbaa Duration: 199.56 ms Billed Duration: 200 ms Memory Size: 128 MB Max Memory Used: 56 MB
...break...
2024/08/18/[$LATEST]d86ecb94a39d44778f35bc2200b077a7 2024-08-18T00:46:22.909000 REPORT RequestId: dd200d9d-cf35-4813-a243-ca8cf7435908 Duration: 194.60 ms Billed Duration: 195 ms Memory Size: 128 MB Max Memory Used: 56 MB
...break...
2024/08/18/[$LATEST]661b5b35a7c54641adb72974b273b78a 2024-08-18T00:48:01.610000 REPORT RequestId: afae88d1-3873-40a3-8b82-caa7019ca45e Duration: 1.94 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 32 MB Init Duration: 117.62 ms
...
2024/08/18/[$LATEST]661b5b35a7c54641adb72974b273b78a 2024-08-18T00:48:03.292000 REPORT RequestId: d7011c87-e6a2-4d76-bb39-4c32b754b991 Duration: 1.71 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 32 MB
...
2024/08/18/[$LATEST]661b5b35a7c54641adb72974b273b78a 2024-08-18T00:48:06.905000 REPORT RequestId: 0eab1866-b11f-4a26-8234-be07f47ecb49 Duration: 1.62 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 32 MB
...
2024/08/18/[$LATEST]661b5b35a7c54641adb72974b273b78a 2024-08-18T00:48:12.696000 REPORT RequestId: f0cc5b4b-f3c3-49d5-9708-fce265581ed2 Duration: 1.51 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 32 MB
...
2024/08/18/[$LATEST]661b5b35a7c54641adb72974b273b78a 2024-08-18T00:48:13.202000 REPORT RequestId: 40367789-27c0-419b-8483-cf054978e9b6 Duration: 1.51 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 32 MB
...
2024/08/18/[$LATEST]661b5b35a7c54641adb72974b273b78a 2024-08-18T00:48:13.552000 REPORT RequestId: 6d166356-5a6c-44c7-b5dd-5c2808340b79 Duration: 1.38 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 32 MB
with s3 call - here we are talking
2024/08/18/[$LATEST]992dbfa1ec234d2aa1d9d6003de766de 2024-08-18T00:54:55.322000 REPORT RequestId: d97fd1cd-d9ef-4d16-adcb-514fa65ca6f8 Duration: 513.99 ms Billed Duration: 514 ms Memory Size: 128 MB Max Memory Used: 77 MB
...
a break
...
2024/08/18/[$LATEST]992dbfa1ec234d2aa1d9d6003de766de 2024-08-18T00:55:02.063000 REPORT RequestId: e6e6884d-d6b6-4dc7-aede-f3863f3b331d Duration: 519.35 ms Billed Duration: 520 ms Memory Size: 128 MB Max Memory Used: 77 MB
...
2024/08/18/[$LATEST]992dbfa1ec234d2aa1d9d6003de766de 2024-08-18T00:55:02.202000 REPORT RequestId: 91eeaca0-c983-4e99-9608-36948511bd27 Duration: 23.95 ms Billed Duration: 24 ms Memory Size: 128 MB Max Memory Used: 77 MB
...
2024/08/18/[$LATEST]992dbfa1ec234d2aa1d9d6003de766de 2024-08-18T00:55:02.662000 REPORT RequestId: d7035256-53f8-463c-93fd-f5de608f47a6 Duration: 33.55 ms Billed Duration: 34 ms Memory Size: 128 MB Max Memory Used: 77 MB
...
2024/08/18/[$LATEST]992dbfa1ec234d2aa1d9d6003de766de 2024-08-18T00:55:03.082000 REPORT RequestId: a2e338b3-f18e-4644-8f6d-2ab151421996 Duration: 21.50 ms Billed Duration: 22 ms Memory Size: 128 MB Max Memory Used: 77 MB
...
2024/08/18/[$LATEST]992dbfa1ec234d2aa1d9d6003de766de 2024-08-18T00:55:03.562000 REPORT RequestId: 111665a1-f43c-488b-bc02-cd203fef478f Duration: 42.58 ms Billed Duration: 43 ms Memory Size: 128 MB Max Memory Used: 77 MB
Memory size: 77 MB and Billed duraion ~35 ms… Warm-up time 1/2 sec
cleanup aws cloudformation stack
sam delete --stack-name "t1-py"
Build, Test, Deploy and Execute - JavaScript based Lambda function
JS local
build and run local
sam build
sam local invoke
produces
REPORT RequestId: 9e3c0a43-6432-4cc7-babf-f591773e5315 Init Duration: 0.05 ms Duration: 126.34 ms Billed Duration: 127 ms Memory Size: 128 MB Max Memory Used: 128 MB
REPORT RequestId: 2856e8f1-166f-4a90-a094-d575ef00ff69 Init Duration: 0.02 ms Duration: 43.73 ms Billed Duration: 44 ms Memory Size: 128 MB Max Memory Used: 128 MB
REPORT RequestId: f1156bd5-dd9f-4c1c-b65d-68c04df5a987 Init Duration: 0.02 ms Duration: 42.79 ms Billed Duration: 43 ms Memory Size: 128 MB Max Memory Used: 128 MB
s3 call from local durations:
REPORT RequestId: 06c4a5a0-6f1a-4e09-9518-cf706d08c319 Init Duration: 0.13 ms Duration: 280.33 ms Billed Duration: 281 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: 4393e8bd-c59b-42e5-83b5-1729d0fb4d8f Init Duration: 0.08 ms Duration: 270.42 ms Billed Duration: 271 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: 90979693-7245-4f88-9f6b-070be83f75df Init Duration: 0.05 ms Duration: 431.86 ms Billed Duration: 432 ms Memory Size: 128 MB Max Memory Used: 128 MB
JS on aws
Deploy and agree to what sam asks and telling to allow unauthenticated calls to our lambda functions
sam deploy --guided
# now listen to the logs
sam logs -n HelloWorldFunction --stack-name t2-js --tail
#or
sam logs -n HelloWorldS3Function --stack-name t2-js --tail
and after cURLing in in another console, the logs
2024/08/18/[$LATEST]fe2dcf2abd9041a0b90630c2c8aa0005 2024-08-18T01:38:38.831000 REPORT RequestId: 24e86600-e316-4678-81db-41eafff81aa0 Duration: 4.92 ms Billed Duration: 5 ms Memory Size: 128 MB Max Memory Used: 62 MB Init Duration: 139.82 ms
...
2024/08/18/[$LATEST]fe2dcf2abd9041a0b90630c2c8aa0005 2024-08-18T01:38:47.451000 REPORT RequestId: 0d269d7f-61f6-4b48-b3c2-6f83aaba5f45 Duration: 2.58 ms Billed Duration: 3 ms Memory Size: 128 MB Max Memory Used: 62 MB
...
2024/08/18/[$LATEST]fe2dcf2abd9041a0b90630c2c8aa0005 2024-08-18T01:38:58.622000 REPORT RequestId: f1bd0e5a-d1d0-4136-9b02-6fba4dcc9a70 Duration: 1.34 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 63 MB
...
2024/08/18/[$LATEST]fe2dcf2abd9041a0b90630c2c8aa0005 2024-08-18T01:38:59.089000 REPORT RequestId: baa791a7-4f9c-41be-b516-81213bc7a365 Duration: 1.44 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 63 MB
...
2024/08/18/[$LATEST]fe2dcf2abd9041a0b90630c2c8aa0005 2024-08-18T01:38:59.966000 REPORT RequestId: ea2a1515-1188-4a44-956f-91f2fc97491f Duration: 1.46 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 63 MB
...
2024/08/18/[$LATEST]fe2dcf2abd9041a0b90630c2c8aa0005 2024-08-18T01:39:00.428000 REPORT RequestId: 0f536ec5-26cb-42b9-beaa-045984b8c468 Duration: 1.45 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 63 MB
Nice. not much time spent on doing nothing. but doesn’t fall asleep either.
Reading from s3 bucket lambda function in javascript performance
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:42:45.155000 REPORT RequestId: c4630419-4502-467c-9cda-c5087d6b2743 Duration: 1051.97 ms Billed Duration: 1052 ms Memory Size: 128 MB Max Memory Used: 88 MB Init Duration: 411.76 ms
...break...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:42:52.195000 REPORT RequestId: 4b881f2b-4b30-4890-afc2-b7299b6397b3 Duration: 259.87 ms Billed Duration: 260 ms Memory Size: 128 MB Max Memory Used: 89 MB
...break...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:42:58.455000 REPORT RequestId: 77f4d820-2f2e-4190-a1e3-bc4821ccdb9b Duration: 165.44 ms Billed Duration: 166 ms Memory Size: 128 MB Max Memory Used: 89 MB
...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:43:03.095000 REPORT RequestId: 41ce9fd8-aaf4-46c4-a827-0a45592041c0 Duration: 63.74 ms Billed Duration: 64 ms Memory Size: 128 MB Max Memory Used: 89 MB
...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:43:03.695000 REPORT RequestId: 9494f176-3818-4fb3-a581-857f1eb2df23 Duration: 73.16 ms Billed Duration: 74 ms Memory Size: 128 MB Max Memory Used: 89 MB
...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:43:04.315000 REPORT RequestId: 528c909f-4a08-415e-a713-e3d9e9e4d615 Duration: 87.44 ms Billed Duration: 88 ms Memory Size: 128 MB Max Memory Used: 89 MB
...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:43:04.835000 REPORT RequestId: 9b636429-56f5-4974-afe9-e53e786adb61 Duration: 55.62 ms Billed Duration: 56 ms Memory Size: 128 MB Max Memory Used: 89 MB
...
2024/08/18/[$LATEST]8e22ce6f54074c6098cdbf89ed0ca0b9 2024-08-18T01:43:05.415000 REPORT RequestId: d4c298df-b237-4605-894f-fde05fe0461a Duration: 69.88 ms Billed Duration: 70 ms Memory Size: 128 MB Max Memory Used: 89 MB
Cleanup AWS js
deleting…
sam delete --stack-name t2-js
Build, Test, Deploy and Execute - Golang based Lambda function
Testing Local Golang Lambda
To be precise - making test calls, not running unit tests.
The sam build command is inside of the Makefile. So we are running:
make
run single function
sam local invoke HelloWorldFunction --event events/event.json
sam local invoke HelloWorldFunction --event events/event.json
sam local invoke HelloWorldFunction --event events/event.json
sam local invoke HelloWorldS3Function --event events/event.json
sam local invoke HelloWorldS3Function --event events/event.json
sam local invoke HelloWorldS3Function --event events/event.json
Option 2: now start local server:
sam local start-api
the output:
now in separate terminal window:
curl http://localhost:3000/hello
curl http://localhost:3000/hello
curl http://localhost:3000/hello
curl http://localhost:3000/hellos3
curl http://localhost:3000/hellos3
curl http://localhost:3000/hellos3
the output of local simple call to golang based lambda:
REPORT RequestId: 54cc3271-7f04-44a3-8d91-d5d69d2428ea Init Duration: 0.03 ms Duration: 2.24 ms Billed Duration: 3 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: c753bdf9-1af0-4b40-9516-5fb2ad96ba00 Duration: 0.29 ms Billed Duration: 1 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: edceb310-e6e9-4f0a-bd6e-58afd40e9b70 Duration: 0.28 ms Billed Duration: 1 ms Memory Size: 128 MB Max Memory Used: 128 MB
the output of local “s3” call to golang based lambda:
REPORT RequestId: 1556e298-a17a-4d45-9fdc-b7f62118c246 Init Duration: 0.06 ms Duration: 142.76 ms Billed Duration: 143 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: e4638fb4-52f4-4086-b673-c9de0f02d3f7 Duration: 86.75 ms Billed Duration: 87 ms Memory Size: 128 MB Max Memory Used: 128 MB
...
REPORT RequestId: b1bdcbf8-06f8-4605-a7da-d34f41198811 Duration: 105.07 ms Billed Duration: 106 ms Memory Size: 128 MB Max Memory Used: 128 MB
the duraition of 1ms is looking good, but Memory Size: 128 MB? Why? should be like 12MB? Probably that’s minimum they have.
Testing AWS Golang Lambda
sam deploy --guided
start the logs listener
sam logs -n HelloWorldFunction --stack-name t3-go --tail
and call the function 3 times:
curl https://k92zaa81w8.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
curl https://k92zaa81w8.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
curl https://k92zaa81w8.execute-api.ap-southeast-2.amazonaws.com/Prod/hello/
in the logs we see:
2024/08/18/[$LATEST]1f5b2a65bda1433789d9281d02cf4622 2024-08-18T04:18:02.908000 REPORT RequestId: 358b5762-dad7-4380-a83f-e21349fae20b Duration: 11.71 ms Billed Duration: 70 ms Memory Size: 128 MB Max Memory Used: 20 MB Init Duration: 57.52 ms
...break...
2024/08/18/[$LATEST]1f5b2a65bda1433789d9281d02cf4622 2024-08-18T04:18:07.404000 REPORT RequestId: 3051d741-504a-49ae-95b3-077628b4b929 Duration: 0.99 ms Billed Duration: 1 ms Memory Size: 128 MB Max Memory Used: 20 MB
...break...
2024/08/18/[$LATEST]1f5b2a65bda1433789d9281d02cf4622 2024-08-18T04:18:11.923000 REPORT RequestId: 51c38ca9-920d-4f30-be75-a1a44538c9ee Duration: 1.02 ms Billed Duration: 2 ms Memory Size: 128 MB Max Memory Used: 20 MB
...
2024/08/18/[$LATEST]1f5b2a65bda1433789d9281d02cf4622 2024-08-18T04:18:12.486000 REPORT RequestId: 98727f66-f3f1-46ad-9a5a-55a6243609ba Duration: 0.96 ms Billed Duration: 1 ms Memory Size: 128 MB Max Memory Used: 20 MB
...
2024/08/18/[$LATEST]1f5b2a65bda1433789d9281d02cf4622 2024-08-18T04:18:13.015000 REPORT RequestId: 9d8bfb28-d4eb-4868-9af7-3b3946acc92c Duration: 0.98 ms Billed Duration: 1 ms Memory Size: 128 MB Max Memory Used: 20 MB
- Billed duration is 2ms. Good.
- Max Memory Used: 20 MB. Expected
- Looks like it doesn’t fall into a sleep
Now let’s do the same for lambda function that has a call to S3 inside
2024/08/18/[$LATEST]8bd6f2bea333485aad2cbf5166433cf5 2024-08-18T04:22:57.711000 REPORT RequestId: 9f09db3e-d9bc-45fe-9674-df133f0f1dc2 Duration: 28.08 ms Billed Duration: 29 ms Memory Size: 128 MB Max Memory Used: 37 MB
...
2024/08/18/[$LATEST]8bd6f2bea333485aad2cbf5166433cf5 2024-08-18T04:23:15.324000 REPORT RequestId: 4bc39553-6a42-4347-b322-6c80f24cdb01 Duration: 30.56 ms Billed Duration: 31 ms Memory Size: 128 MB Max Memory Used: 38 MB
...
2024/08/18/[$LATEST]8bd6f2bea333485aad2cbf5166433cf5 2024-08-18T04:23:51.144000 REPORT RequestId: 55ac2b18-394c-4699-87a5-4ba52230f386 Duration: 27.01 ms Billed Duration: 28 ms Memory Size: 128 MB Max Memory Used: 38 MB
Cleanup
Don’t forget to remove it
sam delete --stack-name t3-go
