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treq

Tracer for module requires/imports to optimize coldstarts in serverless

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treq

workflow npm version license

treq is a library to automatically trace requires/imports in your serverless applications and gives you insights about the most expensive modules in terms of coldstart overhead.

START RequestId: 7419d6fb-7dcb-4c53-a689-0d1d352328bc Version: $LATEST
2022-03-28T20:28:47.740Z	undefined	INFO	|-- require('/var/task/index.js') took 630.785845 ms
2022-03-28T20:28:47.740Z	undefined	INFO	..|-- require('@aws-sdk/client-dynamodb') took 282.050937 ms
2022-03-28T20:28:47.740Z	undefined	INFO	....|-- require('./DynamoDB') took 262.586494 ms
2022-03-28T20:28:47.740Z	undefined	INFO	......|-- require('./commands/BatchExecuteStatementCommand') took 54.849051 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('@aws-sdk/smithy-client') took 10.210297 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('../protocols/Aws_json1_0') took 25.35611 ms
2022-03-28T20:28:47.740Z	undefined	INFO	..........|-- require('uuid') took 11.320902 ms
2022-03-28T20:28:47.740Z	undefined	INFO	......|-- require('./DynamoDBClient') took 187.273312 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('@aws-sdk/config-resolver') took 12.8885 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('@aws-sdk/middleware-endpoint-discovery') took 12.118507 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('@aws-sdk/middleware-retry') took 13.529461 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('@aws-sdk/middleware-signing') took 17.70112 ms
2022-03-28T20:28:47.740Z	undefined	INFO	..........|-- require('./configurations') took 14.718523 ms
2022-03-28T20:28:47.740Z	undefined	INFO	............|-- require('@aws-sdk/signature-v4') took 11.853916 ms
2022-03-28T20:28:47.740Z	undefined	INFO	..............|-- require('./SignatureV4') took 10.149309 ms
2022-03-28T20:28:47.740Z	undefined	INFO	........|-- require('./runtimeConfig') took 123.567573 ms
2022-03-28T20:28:47.740Z	undefined	INFO	..........|-- require('@aws-sdk/client-sts') took 120.895623 ms
2022-03-28T20:28:47.740Z	undefined	INFO	............|-- require('./STS') took 116.251668 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..............|-- require('./commands/AssumeRoleCommand') took 22.53696 ms
2022-03-28T20:28:47.741Z	undefined	INFO	................|-- require('../protocols/Aws_query') took 20.750245 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..................|-- require('entities') took 14.045998 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..............|-- require('./STSClient') took 89.669653 ms
2022-03-28T20:28:47.741Z	undefined	INFO	................|-- require('./runtimeConfig') took 87.875766 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..................|-- require('@aws-sdk/credential-provider-node') took 84.898272 ms
2022-03-28T20:28:47.741Z	undefined	INFO	....................|-- require('./defaultProvider') took 83.672074 ms
2022-03-28T20:28:47.741Z	undefined	INFO	......................|-- require('@aws-sdk/credential-provider-ini') took 76.227651 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........................|-- require('./fromIni') took 75.707995 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..........................|-- require('./resolveProfileData') took 70.243135 ms
2022-03-28T20:28:47.741Z	undefined	INFO	............................|-- require('./resolveAssumeRoleCredentials') took 12.684291 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..............................|-- require('./resolveCredentialSource') took 12.257091 ms
2022-03-28T20:28:47.741Z	undefined	INFO	................................|-- require('@aws-sdk/credential-provider-imds') took 11.887286 ms
2022-03-28T20:28:47.741Z	undefined	INFO	............................|-- require('./resolveSsoCredentials') took 54.422646 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..............................|-- require('@aws-sdk/credential-provider-sso') took 53.719582 ms
2022-03-28T20:28:47.741Z	undefined	INFO	................................|-- require('./fromSSO') took 52.288542 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..................................|-- require('./resolveSSOCredentials') took 50.657345 ms
2022-03-28T20:28:47.741Z	undefined	INFO	....................................|-- require('@aws-sdk/client-sso') took 50.277645 ms
2022-03-28T20:28:47.741Z	undefined	INFO	......................................|-- require('./SSO') took 43.303073 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........................................|-- require('./SSOClient') took 35.038433 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..........................................|-- require('./runtimeConfig') took 34.253186 ms
2022-03-28T20:28:47.741Z	undefined	INFO	............................................|-- require('@aws-sdk/node-http-handler') took 14.914675 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..|-- require('@aws-sdk/client-s3') took 138.489329 ms
2022-03-28T20:28:47.741Z	undefined	INFO	....|-- require('./S3') took 123.365087 ms
2022-03-28T20:28:47.741Z	undefined	INFO	......|-- require('./commands/AbortMultipartUploadCommand') took 44.071934 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........|-- require('../models/models_0') took 10.537944 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........|-- require('../protocols/Aws_restXml') took 27.656476 ms
2022-03-28T20:28:47.741Z	undefined	INFO	......|-- require('./commands/DeleteObjectsCommand') took 15.740644 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........|-- require('@aws-sdk/middleware-flexible-checksums') took 15.35287 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..........|-- require('./flexibleChecksumsMiddleware') took 13.63264 ms
2022-03-28T20:28:47.741Z	undefined	INFO	............|-- require('./selectChecksumAlgorithmFunction') took 10.345904 ms
2022-03-28T20:28:47.741Z	undefined	INFO	......|-- require('./S3Client') took 18.328771 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........|-- require('./runtimeConfig') took 12.748143 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..|-- require('@aws-sdk/client-sqs') took 24.766564 ms
2022-03-28T20:28:47.741Z	undefined	INFO	....|-- require('./SQS') took 19.305477 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..|-- require('@aws-sdk/client-ssm') took 185.064697 ms
2022-03-28T20:28:47.741Z	undefined	INFO	....|-- require('./SSM') took 135.679327 ms
2022-03-28T20:28:47.741Z	undefined	INFO	......|-- require('./commands/AddTagsToResourceCommand') took 62.956037 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........|-- require('../models/models_0') took 17.333932 ms
2022-03-28T20:28:47.741Z	undefined	INFO	........|-- require('../protocols/Aws_json1_1') took 44.988784 ms
2022-03-28T20:28:47.741Z	undefined	INFO	..........|-- require('../models/models_1') took 11.553608 ms
2022-03-28T20:28:47.742Z	undefined	INFO	....|-- require('./commands') took 19.612849 ms
2022-03-28T20:28:47.742Z	undefined	INFO	......|-- require('./ListDocumentsCommand') took 13.616722 ms
2022-03-28T20:28:47.742Z	undefined	INFO	....|-- require('./pagination') took 19.10802 ms
END RequestId: 7419d6fb-7dcb-4c53-a689-0d1d352328bc
REPORT RequestId: 7419d6fb-7dcb-4c53-a689-0d1d352328bc	Duration: 2.86 ms	Billed Duration: 3 ms	Memory Size: 2048 MB	Max Memory Used: 95 MB	Init Duration: 798.59 ms	
XRAY TraceId: 1-62421a7e-0920949e7de8b8455b00f7c4	SegmentId: 05b5512a6f0e008a	Sampled: true

Installation

You can add treq package into your AWS Lambda function either by NPM package or by AWS Lambda layer as shown below:

By NPM package

To install the middleware, you can use NPM:

npm install --save treq

By AWS Lambda Layer

You can also add treq as layer into your AWS Lambda function.

arn:aws:lambda:${region}:273094347961:layer:treq:2

Note: In the ARN above, you need to replace ${region} with the actual AWS region you deployed your AWS Lambda function.

Usage

  • Configure treq to be required/bootstrapped automatically at startup by setting NODE_OPTIONS environment variable:
NODE_OPTIONS=-r treq
  • Optionally, you can configure require duration threshold (in milliseconds) for tracing. Requires/imports take lower than the threshold are ignored from tracing. By default, the threshold is 10 milliseconds and it can be configured by TREQ_DURATION_THRESHOLD environment variable. For example:
TREQ_DURATION_THRESHOLD=20
  • Optionally, you can configure maximum depth/level limit to trace nested requires/imports. Nested requires/imports deeper than the maximum depth/level limit are ignored from tracing. By default, the max depth is 100 and it can be configured by TREQ_MAX_DEPTH environment variable. For example:
TREQ_MAX_DEPTH=3
  • Optionally, you can disable treq by setting TREQ_DISABLE environment variable to true. For example:
TREQ_DISABLE=true

Contributing

Everyone is very welcome to contribute to this repository. Feel free to raise issues or to submit Pull Requests.

License

Licensed under MIT License.

Keywords

coldstart
serverless
aws
lambda
tracer

FAQs

Package last updated on 30 Mar 2022

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