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perf: cache jest fn call parsing results #1187

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merged 2 commits into from Aug 15, 2022
Merged

perf: cache jest fn call parsing results #1187

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897a943
perf: cache jest fn call parsing results
G-Rath Jul 25, 2022
5b22fcf
refactor: avoid `has` call & strongly type `WeakMap`
G-Rath Aug 8, 2022
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17 changes: 17 additions & 0 deletions src/rules/utils/parseJestFnCall.ts
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Expand Up @@ -181,6 +181,8 @@ const resolvePossibleAliasedGlobal = (
return null;
};

const parseJestFnCallCache = new WeakMap();

export const parseJestFnCall = (
node: TSESTree.CallExpression,
context: TSESLint.RuleContext<string, unknown[]>,
Expand All @@ -197,6 +199,21 @@ export const parseJestFnCall = (
export const parseJestFnCallWithReason = (
node: TSESTree.CallExpression,
context: TSESLint.RuleContext<string, unknown[]>,
): ParsedJestFnCall | string | null => {
if (parseJestFnCallCache.has(node)) {
return parseJestFnCallCache.get(node);
}

const parsedJestFnCall = parseJestFnCallWithReasonInner(node, context);
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parseJestFnCallCache.set(node, parsedJestFnCall);

return parsedJestFnCall;
};

const parseJestFnCallWithReasonInner = (
node: TSESTree.CallExpression,
context: TSESLint.RuleContext<string, unknown[]>,
): ParsedJestFnCall | string | null => {
const chain = getNodeChain(node);

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