Tracking Issue for `-Zbuild-analysis`

[weihanglo]

Summary

Original issue: rust-lang/rust-project-goals#332
Implementation:
Documentation:

The -Zbuild-analysis feature records and persists detailed build metrics (timings, rebuild reasons, etc.) across runs, with new commands to query past builds.

Unresolved Issues

No response

Future Extensions

No response

About tracking issues

Tracking issues are used to record the overall progress of implementation.
They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature.
Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.

[weihanglo]

Implementation tasks

See the design doc: https://hackmd.io/K5-sGEJeR5mLGsJLXqsHrw

• Nightly feature gate and configuration feat(unstable): add -Zbuild-analysis unstable feature #15845
• Storage infrastructure, storage path, migration, etc.
• Collecting metrics
  • Collect build metadata (CLI, timestamp, etc)
  • Collect timing data
  • Collect rebuild reason data
• Set up new unstable cargo report subcommands
  • cargo report timing
  • cargo report rebuild-reason
• benchmark the build performance impact