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url: /api/symbols/workbox-swkit/precaching/parallel.md
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# Parallel

Interface @vite-pwa/workbox-swkit/precaching

Controls parallel precaching of assets during service worker installation.
When enabled, assets are fetched concurrently up to `concurrency` at a time
instead of one by one.

Limiting concurrency prevents net::ERR_INSUFFICIENT_RESOURCES errors in Chrome
and reduces bandwidth impact on the main app during service worker installation.

## Properties