Individual skill

ruby-optimise

Ruby performance optimization guidelines. This skill should be used when writing, reviewing, or refactoring Ruby code to ensure optimal performance patterns. Triggers on tasks involving object allocation, collection processing, ActiveRecord queries, string handling, concurrency, or Ruby runtime configuration.

skills/.curated/ruby-optimise/SKILL.md

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Repository stars (not skill ratings): 222
Repository last updated: Aug 15, 2026
License: MIT

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AGENTS.mddoc · 9,561 bytes
README.mddoc · 4,418 bytes
SKILL.mdcore · 6,967 bytes
assets/templates/_template.mddoc · 577 bytes
metadata.jsonasset · 1,228 bytes
references/_sections.mddoc · 2,045 bytes
references/alloc-avoid-implicit-conversions.mddoc · 2,133 bytes
references/alloc-avoid-temp-arrays.mddoc · 1,616 bytes
references/alloc-avoid-unnecessary-dup.mddoc · 1,445 bytes
references/alloc-freeze-constants.mddoc · 1,873 bytes
references/alloc-lazy-initialization.mddoc · 1,974 bytes
references/alloc-reuse-buffers.mddoc · 1,677 bytes
references/conc-avoid-shared-mutable-state.mddoc · 1,588 bytes
references/conc-fiber-for-io.mddoc · 1,559 bytes
references/conc-ractor-cpu-bound.mddoc · 2,174 bytes
references/conc-thread-pool-sizing.mddoc · 1,461 bytes
references/ds-array-preallocation.mddoc · 1,389 bytes
references/ds-hash-default-value.mddoc · 1,676 bytes
references/ds-set-for-membership.mddoc · 1,114 bytes
references/ds-sort-by-over-sort.mddoc · 1,303 bytes
references/ds-struct-over-openstruct.mddoc · 1,462 bytes
references/enum-avoid-count-in-loops.mddoc · 1,346 bytes
references/enum-chunk-batch-processing.mddoc · 1,386 bytes
references/enum-each-with-object.mddoc · 1,413 bytes
references/enum-flat-map.mddoc · 1,010 bytes
references/enum-lazy-large-collections.mddoc · 1,548 bytes
references/enum-single-pass.mddoc · 1,174 bytes
references/io-avoid-queries-in-loops.mddoc · 1,224 bytes
references/io-batch-find-each.mddoc · 1,082 bytes
references/io-cache-expensive-queries.mddoc · 1,771 bytes
references/io-connection-pool-sizing.mddoc · 1,314 bytes
references/io-eager-load-associations.mddoc · 1,378 bytes
references/io-select-only-needed-columns.mddoc · 1,211 bytes
references/io-stream-large-files.mddoc · 1,282 bytes
references/meth-avoid-dynamic-send.mddoc · 1,556 bytes
references/meth-avoid-method-missing-hot-paths.mddoc · 1,626 bytes
references/meth-block-vs-proc.mddoc · 1,553 bytes
references/meth-cache-method-references.mddoc · 1,131 bytes
references/meth-reduce-method-chain-depth.mddoc · 1,359 bytes
references/runtime-enable-yjit.mddoc · 1,304 bytes
references/runtime-frozen-string-literal-default.mddoc · 1,745 bytes
references/runtime-optimize-require.mddoc · 1,633 bytes
references/runtime-tune-gc-parameters.mddoc · 2,319 bytes
references/str-avoid-repeated-gsub.mddoc · 1,809 bytes
references/str-frozen-literals.mddoc · 1,899 bytes
references/str-interpolation-over-concatenation.mddoc · 1,519 bytes
references/str-shovel-over-plus.mddoc · 1,617 bytes
references/str-symbol-for-identifiers.mddoc · 1,739 bytes

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# Community Ruby Best Practices

Comprehensive performance optimization guide for Ruby applications, maintained by the community. Contains 42 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

## When to Apply

Reference these guidelines when:
- Writing new Ruby code or gems
- Optimizing ActiveRecord queries and database access patterns
- Processing large collections or building data pipelines
- Reviewing code for memory bloat and GC pressure
- Configuring Ruby runtime settings for production

## Rule Categories by Priority