WIP: prototype of spawn io worker

[invisig0th]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 13.33333% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.59%. Comparing base (cdf23ac) to head (14420da).

Files with missing lines	Patch %	Lines
synapse/lib/base.py	13.33%	26 Missing ⚠️

❌ Your patch check has failed because the patch coverage (13.33%) is below the target coverage (97.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4567      +/-   ##
==========================================
- Coverage   97.70%   97.59%   -0.12%     
==========================================
  Files         295      295              
  Lines       61955    61985      +30     
==========================================
- Hits        60536    60494      -42     
- Misses       1419     1491      +72     

Flag	Coverage Δ
linux	97.59% <13.33%> (-0.05%)	⬇️
linux_replay	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.