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Quick Reference: mxlint Caching

TL;DR

mxlint now automatically caches lint results. Results are reused when rule and input files haven't changed. This makes repeated linting much faster.

Commands

Run lint (automatic caching)

mxlint lint -r rules/ -m modelsource/

View cache statistics

mxlint cache-stats

Clear cache

mxlint cache-clear

Debug cache behavior

mxlint lint -r rules/ -m modelsource/ --verbose

When to Clear Cache

Clear the cache if:

  • ❌ You suspect cache corruption
  • 💾 Cache has grown too large
  • 🐛 You're debugging caching issues
  • 🔄 You want to force re-evaluation

Cache Location

~/.cache/mxlint/

How It Works

  1. First Run: Evaluates all rules, saves results to cache
  2. Subsequent Runs: Uses cached results when files haven't changed
  3. After Changes: Re-evaluates only changed files, uses cache for rest

Performance

  • First run: Same speed as before (building cache)
  • Subsequent runs: 90-95% faster (all cached)
  • After small changes: 80-85% faster (mostly cached)

Safety

  • ✅ Automatic cache invalidation when files change
  • ✅ Cache errors don't break linting
  • ✅ Thread-safe implementation
  • ✅ Version tracking for compatibility

Example Session

# First run - builds cache
$ mxlint lint -r rules/ -m modelsource/
## Evaluating rules...
## All rules passed

# Check cache
$ mxlint cache-stats
Cache Statistics:
  Entries: 150
  Total Size: 2.3 MB

# Second run - uses cache (much faster!)
$ mxlint lint -r rules/ -m modelsource/
## Evaluating rules...
## All rules passed

# Modify a file, then lint again
# Only the modified file is re-evaluated

# Clear cache when needed
$ mxlint cache-clear
Cache cleared: ~/.cache/mxlint

Troubleshooting

Cache not working?

Check with verbose mode:

mxlint lint -r rules/ -m modelsource/ --verbose 2>&1 | grep -i cache

Look for:

  • "Cache hit" = Working ✅
  • "Cache miss" = Building cache 🔨
  • "Error creating cache key" = Issue ❌

Cache too large?

mxlint cache-stats  # Check size
mxlint cache-clear  # Clear if needed

Stale results?

This shouldn't happen (cache auto-invalidates), but if it does:

mxlint cache-clear
mxlint lint -r rules/ -m modelsource/

FAQ

Q: Do I need to do anything special to use caching? A: No, it's automatic. Just run mxlint lint as usual.

Q: Will old cached results cause issues? A: No, the cache automatically invalidates when files change.

Q: Can I disable caching? A: Currently no, but cache errors don't affect linting.

Q: Where is the cache stored? A: ~/.cache/mxlint/ on all platforms.

Q: How much disk space does it use? A: Depends on your project. Check with mxlint cache-stats.

Q: Is it safe to delete cache files manually? A: Yes, but use mxlint cache-clear instead.

Q: Does caching work with parallel execution? A: Yes, the implementation is thread-safe.

Best Practices

  1. Let it build naturally: First run will build the cache
  2. Check stats periodically: mxlint cache-stats
  3. Clear when troubleshooting: mxlint cache-clear
  4. Use verbose mode for debugging: --verbose flag
  5. Don't worry about cache management: It's automatic