CAT 038

CAT-038 — Capacity hints for large collections

Severity: info | Confidence: medium | Auto-fix: ❌

Description

Capacity hints for large collections — Pre-allocate capacity with .new(capacity) for large collections to avoid repeated resizing.

Bad code

ary = [] of Int32
10_000.times { |i| ary << i }

Benchmark

Note

See bench results at bench/cat-038/