All tags / #performance
3 posts
Declare fullName or commentCount once as SQL on the model and it behaves like a column everywhere — sortable, selectable, never stale. And Wheels 4's select=false + includeCalculated pair fixes the cost problem calculated properties always created: expensive expressions run only where they're asked for, additively.
findAll on 400,000 rows materializes everything into memory at once — and the request cache holds it there. Wheels 4's findEach and findInBatches walk big result sets a page at a time, with three built-in optimizations you'd forget to hand-roll and two sharp edges worth knowing first.
A practical, source-grounded tour of every cache Wheels 4.0 actually ships — action caching, query caching, partial and page caching — plus the honest truth about invalidation: there's no clearCache(key), so you live on short expiry times and full reloads.