Styled Components in TypeScript 3.4.1 works much slower that in 3.3.4000

I created an issue in TypeScript repo, but looks like this is related to styled-components. Tcs in new version of typescript work super slow if I add styled-components to my react project. You can find all details on typescript repo issue, but I also will add steps to reproduce and demo link here.

Environment

## System:
 - OS: Windows 10
 - CPU: (12) x64 Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
 - Memory: 2.74 GB / 15.94 GB
## Binaries:
 - Node: 11.6.0 - C:\Program Files\nodejs\node.EXE
 - Yarn: 1.15.2 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
 - npm: 6.5.0-next.0 - C:\Program Files\nodejs\npm.CMD

Reproduction

Reproducible demo here: https://repl.it/@EugeneDraitsev/slow-tsc-341

3.3.4000:

3.4.1:

Steps to reproduce

yarn create react-app my-app --typescript
cd my-app
yarn add styled-components @types/styled-components 

add to src/index.tsx:

import styled from 'styled-components'
const Styled = styled.div``

add in package json tsc script in scripts section:

"tsc": "tsc"

run yarn tsc

if you’ll downgrade typescript version to 3.3.4000 or comment 2 lines of code in src/index.tsx it will work 20 times faster

Expected behavior:

Tsc should works with same acceptable time

Actual behavior:

Tsc works 20 times+ slower

[jazzfog]

I ca’t be sure that this issue is on Styled Component’s side, it shouldn’t be actually on @types side either, types are just virtual entities… plus I just rolled back TS version keeping types and it solved the issue. I guess there is something wrong with TypeScript itself…

[jazzfog]

Actually OP already posted there - https://github.com/Microsoft/TypeScript/issues/30663