Hangs while scanning dependencies only in Docker container

Start by reproducing the timing difference with the shown Dockerfile and the docker build/docker run ... pio run -v commands, then inspect the project's platformio.ini dependency configuration. Compare the dependency-scanning path and timings between native Windows and the Python 3.8.7-slim container; done means the container scan no longer has the reported extreme delay and the result is validated on the reproduction setup.

• PlatformIO Core.
  If you’ve found a bug, please provide an information below.

Configuration

Operating system:
Host machine: Windows 10
Docker container:

FROM python:3.8.7-slim

ENV DEBIAN_FRONTEND=noninteractive
ENV PROJ_DIR /firmware

RUN apt-get update -q \
  && apt-get install --no-install-recommends -yq \
  lcov valgrind git \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*

RUN python3 -m pip install --upgrade pip setuptools
RUN python3 -m pip install platformio

# this is a really crappy way to get all the required environment installed in the container
COPY . $PROJ_DIR
RUN pio run --project-dir ${PROJ_DIR} || true
RUN pio system prune -f
RUN rm -r $PROJ_DIR

PlatformIO Version (platformio --version):
Host: PlatformIO Core, version 5.2.3
Docker: PlatformIO Core, version 5.2.3

Description of problem

Compiling firmware on Docker takes a much longer time to scan the dependencies than a native Windows run. I know that the hypervisor can cause extra time but the running it with timestamps shows a 2.61s time on Windows vs 77.52 on Linux (~3000% difference).

Steps to Reproduce

If necessary I can try to create a minimal reproducible but you can use the above docker container and add it to a Platformio project and from the project directory:

docker build -t platformio-builder:latest .
docker run -v [pwd]:/firmware platformio run

Actual Results

Windows:

> filter timestamp {"$(Get-Date -Format o): $_"}; pio run -v | timestamp
...
2021-12-14T10:22:03.72: LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
2021-12-14T10:22:03.72: LDF Modes: Finder ~ chain, Compatibility ~ soft
2021-12-14T10:22:03.98: Found 87 compatible libraries
2021-12-14T10:22:03.98: Scanning dependencies...
2021-12-14T10:22:06.64: Dependency Graph
2021-12-14T10:22:06.64: |-- 

> docker run -v [pwd]:/firmware pio run -v | timestamp
...
10:24:25.59: LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
10:24:25.59: LDF Modes: Finder ~ chain, Compatibility ~ soft
10:24:33.58: Found 87 compatible libraries
10:24:33.58: Scanning dependencies...
10:25:51.10: Dependency Graph
10:25:51.11: |-- ...

Expected Results

The times are closer

If problems with PlatformIO Build System:

The content of platformio.ini:
A little minimal since there's a lot in it

[platformio]
description = Firmware

[env] ;Common is done for all environments
monitor_speed = 115200
monitor_flags= --raw

lib_extra_dirs =
  ./shared-config

; ...

;==========ESP32===========
[env:esp32]
platform = espressif32
board = esp32dev
framework = arduino
build_type = debug
debug_tool = esp-prog
debug_init_break = tbreak setup

Source file to reproduce issue:

Insert here...