Changing openApi version to 3.1.1 in spec file leads to much longer resolving time

[meijey]

Q&A (please complete the following information)

• OS: linux mint 22.3
• Environment: Node.js v22.16.0
• Method of installation: npm i
• Swagger-Client version: 3.36.1
• Swagger/OpenAPI version: OpenApi V.3.0.4 / OpenApi V.3.1.1

Content & configuration

Using the same specfile but changing the openapi version from 3.0.4 to 3.1.1 leads to a much higher resolving time (about 10 - 15x).

I understand that there may be some new functions have to be checked, but the time difference seems a bit odd for me.

On smaller files this may not be that noticable on larger files thou it is (a file with 900 paths goes from ~350ms up to ~5-7s).

Swagger/OpenAPI definition:

Using the default petstore json (https://petstore3.swagger.io/api/v3/openapi.json) shows already a huge difference.

Swagger-Client usage:

const SwaggerClient = require('swagger-client')
const path = require('path')
const fs = require('fs/promises')

const test = async () => {
  // get specs (default petstore)
  const petstoreV3 = JSON.parse(await fs.readFile(path.join(__dirname, './PetstoreV3.0.4.json')))
  const petStoreV311 = JSON.parse(await fs.readFile(path.join(__dirname, './PetstoreV3.1.1.json')))

  // start tests
  console.log('------------------------', __dirname)
  // petstoreV3: ~ 35ms
  console.time('petstore v3')
  await new SwaggerClient({ spec: petstoreV3 })
  console.timeEnd('petstore v3')

  // petStoreV311: ~ 406ms
  console.time('petstore v3.1.1')
  await new SwaggerClient({ spec: petStoreV311 })
  console.timeEnd('petstore v3.1.1')
  console.log('----------------')
}

test()

Describe the bug you're encountering

Much longer loading times.

To reproduce...

Steps to reproduce the behavior:

Use the petstore or any other >3.1.1 version and change it to 3.1.1.
Then use await new SwaggerClient({ spec })

Expected behavior

The loading times difference should propably not be that huge.