[infra] Use fewer cores on Android shards

The shards are currently defaulting to use j4 because the docker host
has 4 cores. 6 devices share one host and are therefore trying to run 20
processes competing for the only 4 physical cores. The docker hosts will
soon be upgraded to have 8 cores. j2 will result in 10 processes
competing for those 8 cores which should result in a better balance
between utilization and latency.

Change-Id: Ieb67cb92f17317108d1a1d3da710c58400484a7c
Reviewed-on: https://dart-review.googlesource.com/c/91540
Reviewed-by: William Hesse <whesse@google.com>
1 file changed
tree: a03fe8944cff3682d9ec8688a374c620f45b0608
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. dartdoc_options.yaml
  28. DEPS
  29. LICENSE
  30. PATENTS
  31. PRESUBMIT.py
  32. README.dart-sdk
  33. README.md
  34. WATCHLISTS
README.md

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