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perf: add filesystem caching support #166

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Merged
merged 4 commits into from
Aug 12, 2022
Merged

perf: add filesystem caching support #166

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dd72a16
Add filesystem caching
thatsmydoing Aug 12, 2022
ccf6126
Create nasty-points-speak.md
JounQin Aug 12, 2022
d804706
Update index.ts
JounQin Aug 12, 2022
c1b7d4d
Update index.ts
JounQin Aug 12, 2022
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5 changes: 5 additions & 0 deletions .changeset/nasty-points-speak.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"eslint-import-resolver-typescript": patch
---

perf: add filesystem caching support
7 changes: 5 additions & 2 deletions src/index.ts
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Expand Up @@ -5,6 +5,7 @@ import { fileURLToPath } from 'node:url'
import debug from 'debug'
import {
FileSystem,
CachedInputFileSystem,
ResolveOptions,
Resolver,
ResolverFactory,
Expand Down Expand Up @@ -113,6 +114,7 @@ const fileSystem = fs as FileSystem
const JS_EXT_PATTERN = /\.(?:[cm]js|jsx?)$/
const RELATIVE_PATH_PATTERN = /^\.{1,2}(?:\/.*)?$/

let previousOptions: TsResolverOptions | null | undefined
let cachedOptions: InternalResolverOptions | undefined

let mappersCachedOptions: InternalResolverOptions
Expand All @@ -135,14 +137,15 @@ export function resolve(
found: boolean
path?: string | null
} {
if (!cachedOptions || cachedOptions !== options) {
if (!cachedOptions || previousOptions !== options) {
previousOptions = options
cachedOptions = {
...options,
conditionNames: options?.conditionNames ?? defaultConditionNames,
extensions: options?.extensions ?? defaultExtensions,
extensionAlias: options?.extensionAlias ?? defaultExtensionAlias,
mainFields: options?.mainFields ?? defaultMainFields,
fileSystem,
fileSystem: new CachedInputFileSystem(fileSystem, 500),
useSyncFileSystemCalls: true,
}
}
Expand Down