terraform-cdk

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Expected Behavior

I'm using simple TypeScript code to generate my resources and CDKTF constructs. I expected it to be a fast process.

Actual Behavior

When I profiled my script (without even running cdktf synth, jsut the script directly), I see huge overhead in captureStackTrace which is seemingly invoked all the time, whenever I call into a CDK TF routine.

Steps to Reproduce

My repro is private, but if you take a sizeable JavaScript CDKTF project, invoke it as:

$ node --inspect-brk main.js

Then capture a performance trace with Chrome devtools, you'll see captureStackTrace all over the place in leaf nodes.

After that, test my workaround/hypothesis by executing the same command, attaching the chrome debugger, but then executing require('cdktf/lib/tokens/private/stack-trace').captureStackTrace = () => []; in the console before recording the performance profile.

Stubbing out captureStackTrace gives me a 10x speedup (3 seconds vs 300ms) in my CDK TF Stack generation. The synth function of CDKTF after that runs in about the same time, it's unaffected.

Versions

typescript

language: null cdktf-cli: 0.20.8 node: v22.3.0 terraform: 1.9.2 arch: x64 os: linux 6.14.5

Providers

┌─────────────────────┬──────────────────┬─────────┬────────────┬─────────────────────────┬─────────────────┐ │ Provider Name │ Provider Version │ CDKTF │ Constraint │ Package Name │ Package Version │ ├─────────────────────┼──────────────────┼─────────┼────────────┼─────────────────────────┼─────────────────┤ │ local │ │ │ 2.5.2 │ │ │ ├─────────────────────┼──────────────────┼─────────┼────────────┼─────────────────────────┼─────────────────┤ │ petetanton/cachet │ │ │ 0.0.8 │ │ │ ├─────────────────────┼──────────────────┼─────────┼────────────┼─────────────────────────┼─────────────────┤ │ mastercard/restapi │ │ │ 1.19.1 │ │ │ ├─────────────────────┼──────────────────┼─────────┼────────────┼─────────────────────────┼─────────────────┤ │ pagerduty/pagerduty │ │ │ 3.18.1 │ │ │ ├─────────────────────┼──────────────────┼─────────┼────────────┼─────────────────────────┼─────────────────┤ │ datadog/datadog │ 3.44.0 │ ^0.20.0 │ │ @cdktf/provider-datadog │ 11.10.0 │ ├─────────────────────┼──────────────────┼─────────┼────────────┼─────────────────────────┼─────────────────┤ │ tfe │ 0.64.0 │ ^0.20.0 │ │ @cdktf/provider-tfe │ 11.12.0 │ └─────────────────────┴──────────────────┴─────────┴────────────┴─────────────────────────┴─────────────────┘

Gist

No response

Possible Solutions

No response

Workarounds

require('cdktf/lib/tokens/private/stack-trace').captureStackTrace = () => [];

before running the bulk of the work in my CDK Stack generation.

Anything Else?

No response

References

No response

Help Wanted

• [ ] I'm interested in contributing a fix myself

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