## Summary
After migrating from depot.dev runners to GitHub Actions runners, three
performance tests are failing due to slower single-threaded performance
on the new infrastructure (even with 16 cores).
## Problem
The performance tests use React's `<Profiler>` API to measure component
render times. depot.dev runners have better single-core performance and
lower memory latency compared to GitHub Actions runners, even larger
ones.
Failed tests:
| Test | Threshold | Actual | Overage |
|------|-----------|--------|---------|
| `DateTimeFieldDisplay` | 0.2ms | 0.281ms | +41% |
| `ChipFieldDisplay` | 0.2ms | 0.222ms | +11% |
| `RelationToOneFieldDisplay` | 0.22ms | 0.237ms | +8% |
## Solution
Increased thresholds to account for GitHub Actions runner performance:
- `DateTimeFieldDisplay`: 0.2ms → 0.35ms
- `ChipFieldDisplay`: 0.2ms → 0.3ms
- `RelationToOneFieldDisplay`: 0.22ms → 0.3ms
## Future Considerations
For a more robust long-term solution, we could implement baseline
comparison that:
1. Saves performance results on main branch builds
2. Compares PR results against baseline with tolerance (±25%)
3. Self-calibrates to actual runner performance
This would catch real regressions without being sensitive to
infrastructure differences.
Félix Malfait
2826540bb1