Samuel Attard 471fe813bb module: avoid allocating a cache key string for every require() ...

The relative resolve cache was keyed by a concatenated
${parent.path}\x00${request} string, allocating a new key for every
require() call including fully cached ones. Key the cache by the
parent directory first (a Map keyed by the already-retained
module.path string) and then by the request (a dictionary object,
whose property access internalizes dynamically-constructed
specifiers). Faster on every measured workload shape and slightly
smaller in memory, since the concatenated keys are no longer
retained.

Signed-off-by: Sam Attard <sattard@anthropic.com>
PR-URL: https://github.com/nodejs/node/pull/63884
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

2026-09-28 23:30:13 +00:00

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cjs

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esm

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customization_hooks.js

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helpers.js

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package_json_reader.js

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package_map.js

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run_main.js

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typescript.js

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