perf(core): reuse persistent worker subprocesses across translation units - #524

  2 files  ±0   12 suites  ±0   0s ⏱️ ±0s
200 tests ±0  200 ✅ ±0  0 💤 ±0  0 ❌ ±0 
400 runs  ±0  400 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 7655308. ± Comparison against earlier commit 1ae05b1.