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Add cache scope handling for dynamic IO for dev/build (#70408)
As discussed this adds an in memory cache scope which is leveraged for seeding during prefetch and then leveraged during non-prefetch requests in development and during build it shares a cache scope across one build worker. During production server mode the cache scopes are specific per-request with no prefetch cache seeding.
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,27 @@ | ||
import { AsyncLocalStorage } from 'async_hooks' | ||
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export interface CacheScopeStore { | ||
cache?: Map<string, any> | ||
} | ||
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export const cacheScopeAsyncLocalStorage = | ||
new AsyncLocalStorage<CacheScopeStore>() | ||
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/** | ||
* For dynamic IO handling we want to have a scoped memory | ||
* cache which can live either the lifetime of a build worker, | ||
* the lifetime of a specific request, or from a prefetch request | ||
* to the request for non-prefetch version of a page (with | ||
* drop-off after so long to prevent memory inflating) | ||
*/ | ||
export function runWithCacheScope( | ||
store: Partial<CacheScopeStore>, | ||
fn: (...args: any[]) => Promise<any> | ||
) { | ||
return cacheScopeAsyncLocalStorage.run( | ||
{ | ||
cache: store.cache || new Map(), | ||
}, | ||
fn | ||
) | ||
} |
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