[fengmk2]

The vinext-utils/prefer-shared-utils rule copies the full source for each comment or string it masks. Large files cause repeated copies and extra garbage collection.

The rule now scans the original source, collects the unchanged sections and replacement spaces, and joins them once. It preserves declaration matching, template handling, and one report per helper per file.

The machine uses an Apple M4 Max, macOS 27.0.1, and Node.js 26.13.0. Both versions check 1,831 files with four threads and OXLINT_TSGOLINT_CHECKER_SCHEDULING=sorted. Only the rule implementation changes between runs.

Each version has one warm-up and five measured runs per configuration. Runs alternate between versions. The table shows median command times.

JS plugins	Type-aware linting and type checking	Before	After	Speedup
Both	Disabled	7.26 s	1.40 s	5.17×
Only prefer-shared-utils	Disabled	7.32 s	1.40 s	5.23×
Both	Enabled	10.02 s	4.12 s	2.43×

The two features use the typeAware and typeCheck options, respectively. Both options change together in these measurements. With both JS plugins, type-aware linting, and type checking disabled, the control median is 0.64 seconds.